C#编程笔记（三）
实在睡不着，整理下以前项目的代码。
跟着项目代码来的，可能略琐碎，见谅。贴了较多代码，只为方便自己以后再用的时候查阅。
1、Excel与Datatable的互操作，相互导入导出。
简单地说，Excel的表结构与DataTable，以及包含了DataTable的DataGridView，格式上是一样的，相互导入导出，就是对齐格式，然后从源拷贝ElementItem的内容到目标Item。
>DataGridView中的数据导出至Excel
DateGridViewExportToExcel
1 // 公用函数 将选定的DataGridView中的内容，输出到Excel表中 2 public void DateGridViewExportToExcel(DataGridView dataGridView1) 3 { 4 //导出到execl 5 try 6 { 7 //没有数据的话就不往下执行 8 if (dataGridView1.Rows.Count == 0) 9 return; 10 //实例化一个Excel.Application对象 11 Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application(); 12 13 //让后台执行设置为不可见，为true的话会看到打开一个Excel，然后数据在往里写 14 excel.Visible = false; 15 16 //新增加一个工作簿，Workbook是直接保存，不会弹出保存对话框，加上Application会弹出保存对话框，值为false会报错 17 excel.Application.Workbooks.Add(true); 18 //生成Excel中列头名称 19 for (int i = 0; i < dataGridView1.Columns.Count; i++) 20 { 21 excel.Cells[1, i + 1] = dataGridView1.Columns[i].HeaderText; 22 } 23 //把DataGridView当前页的数据保存在Excel中 24 for (int i = 0; i < dataGridView1.Rows.Count - 1; i++) 25 { 26 for (int j = 0; j < dataGridView1.Columns.Count; j++) 27 { 28 if (dataGridView1[j, i].ValueType == typeof(string)) 29 { 30 excel.Cells[i + 2, j + 1] = "'" + dataGridView1[j, i].Value.ToString(); 31 } 32 else 33 { 34 excel.Cells[i + 2, j + 1] = dataGridView1[j, i].Value.ToString(); 35 } 36 } 37 } 38 39 //自动调整列宽 40 excel.Columns.AutoFit(); 41 //设置禁止弹出保存和覆盖的询问提示框 42 excel.DisplayAlerts = false; 43 excel.AlertBeforeOverwriting = false; 44 45 //保存工作簿 46 //excel.Application.Workbooks.Add(true).Save(); 47 //保存excel文件 48 excel.Save(@".\temp.xls"); 49 50 //确保Excel进程关闭 51 excel.Quit(); 52 excel = null; 53 54 } 55 catch (Exception ex) 56 { 57 MessageBox.Show(ex.Message, "错误提示"); 58 } 59 }
>DataTable中的数据导出至Excel
DataTableExportToExcel
1 // 公用函数 将选定DataTable中的内容,输出到Excel表中 2 private void DataTableExportToExcel(string msql) 3 { 4 System.Data.DataTable _table = GetDataTable(msql); 5 //导出到execl 6 try 7 { 8 //没有数据的话就不往下执行 9 if (_table.Rows.Count == 0) 10 { 11 MessageBox.Show("表中没有数据"); 12 return; 13 } 14 //实例化一个Excel.Application对象 15 Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application(); 16 17 //让后台执行设置为不可见，为true的话会看到打开一个Excel，然后数据在往里写 18 excel.Visible = false; 19 20 //新增加一个工作簿，Workbook是直接保存，不会弹出保存对话框，加上Application会弹出保存对话框，值为false会报错 21 excel.Application.Workbooks.Add(true); 22 //生成Excel中列头名称 23 for (int i = 0; i < _table.Columns.Count; i++) 24 { 25 excel.Cells[1, i + 1] = _table.Columns[i].ColumnName; 26 } 27 //把DataGridView当前页的数据保存在Excel中 28 for (int i = 0; i < _table.Rows.Count; i++) 29 { 30 for (int j = 0; j < _table.Columns.Count; j++) 31 { 32 if (_table.Columns[j].DataType == typeof(string)) 33 { 34 excel.Cells[i + 2, j + 1] = "'" + _table.Rows[i].ItemArray[j].ToString(); 35 } 36 else 37 { 38 excel.Cells[i + 2, j + 1] = _table.Rows[i].ItemArray[j].ToString(); 39 } 40 } 41 } 42 43 //设置禁止弹出保存和覆盖的询问提示框 44 excel.DisplayAlerts = false; 45 excel.AlertBeforeOverwriting = false; 46 47 //保存工作簿 48 //excel.Application.Workbooks.Add(true).Save(); 49 50 //保存excel文件 51 excel.Save(@".\temp.xls"); 52 53 //确保Excel进程关闭 54 excel.Quit(); 55 excel = null; 56 57 MessageBox.Show("备份完毕"); 58 59 } 60 catch (Exception ex) 61 { 62 MessageBox.Show(ex.Message, "错误提示"); 63 } 64 }
>Excel中的数据导入至Datatable
ExcelToDataTable
1 // 公用函数 把Excel数据读入DataTable 2 private System.Data.DataTable ExcelToDataTable(string strExcelFileName, string strSheetName) 3 { 4 string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + strExcelFileName + ";" + "Extended Properties=Excel 5.0;"; 5 string strExcel = string.Format("select * from [{0}$]", strSheetName); 6 DataSet ds = new DataSet(); 7 8 using (OleDbConnection conn = new OleDbConnection(strConn)) 9 { 10 conn.Open(); 11 OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, strConn); 12 adapter.Fill(ds, strSheetName); 13 conn.Close(); 14 } 15 16 return ds.Tables[strSheetName]; 17 }
以上对于一般的数据库导入导出Excel表，差不多够用了。
2、ComboBox的数据绑定
ComboBox数据绑定
1 SqlDataAdapter dataAdapter2 = new SqlDataAdapter(msql2, ConfigurationManager.ConnectionStrings["OMHMS_Leader.Properties.Settings.OMHMSConnectionString"].ConnectionString); 2 DataSet ds2 = new DataSet(); 3 dataAdapter2.Fill(ds2); 4 this._cbLine.DataSource = ds2.Tables[0].DefaultView; 5 this._cbLine.DisplayMember = "Line_Name";
3、数据绑定到DataGridView
自己在做这种报表数据显示的时候，用了较多的DataGridView，积累下来实现了，只传入SQL语句或者存储过程，即可显示指定的数据。以某一个获取员工信息的方法为例。
GetData
1 // 公用函数 datagridview 数据填充函数 2 private void GetData(string selectCommand, BindingSource bd) 3 { 4 try 5 { 6 // Specify a connection string. Replace the given value with a 7 // valid connection string for a Northwind SQL Server sample 8 // database accessible to your system. 9 10 // Create a new data adapter based on the specified query. 11 SqlDataAdapter dataAdapter = new SqlDataAdapter(selectCommand, ConfigurationManager.ConnectionStrings["OMHMS_Leader.Properties.Settings.OMHMSConnectionString"].ConnectionString); 12 13 // Create a command builder to generate SQL update, insert, and 14 // delete commands based on selectCommand. These are used to 15 // update the database. 16 SqlCommandBuilder commandBuilder = new SqlCommandBuilder(dataAdapter); 17 18 // Populate a new data table and bind it to the BindingSource. 19 System.Data.DataTable table = new System.Data.DataTable(); 20 table.Locale = System.Globalization.CultureInfo.InvariantCulture; 21 dataAdapter.Fill(table); 22 bd.DataSource = table; 23 24 } 25 catch (Exception ex) 26 { 27 MessageBox.Show("出现错误,错误原因为" + ex.Message, 28 "系统提示：", MessageBoxButtons.OK, MessageBoxIcon.Error); 29 } 30 }
SampleDataBinding
1 private void dGVStaffRefresh() 2 { 3 string msql = "select Staff_Cid,Staff_Sid,Staff_Name,Staff_Department,Staff_Line,Staff_Process from OMHMS_Staffs"; 4 BindingSource bs8 = new BindingSource(); 5 this._dGVStaff.DataSource = bs8; 6 GetData(msql, bs8); 7 8 this._dGVStaff.Columns[0].Width = (int)(this._dGVStaff.Width * 0.1); 9 this._dGVStaff.Columns[1].Width = (int)(this._dGVStaff.Width * 0.1); 10 this._dGVStaff.Columns[2].Width = (int)(this._dGVStaff.Width * 0.2); 11 this._dGVStaff.Columns[3].Width = (int)(this._dGVStaff.Width * 0.2); 12 this._dGVStaff.Columns[4].Width = (int)(this._dGVStaff.Width * 0.2); 13 this._dGVStaff.Columns[5].Width = (int)(this._dGVStaff.Width * 0.2); 14 15 this._dGVStaff.Columns[0].HeaderText = "卡号"; 16 this._dGVStaff.Columns[1].HeaderText = "工号"; 17 this._dGVStaff.Columns[2].HeaderText = "姓名"; 18 this._dGVStaff.Columns[3].HeaderText = "部门"; 19 this._dGVStaff.Columns[4].HeaderText = "生产线"; 20 this._dGVStaff.Columns[5].HeaderText = "工序"; 21 }
4、DataGridView选定后打印数据，可打印到文件或打印机。好久之前的活儿了，不记得从哪里K来的，有见过的劳驾M我，一定附上源链接，先谢过了。
核心的是一个DataGridViewPrinter的类：
DataGridViewPrinter
1 class DataGridViewPrinter 2 { 3 private DataGridView TheDataGridView; // The DataGridView Control which will be printed 4 private PrintDocument ThePrintDocument; // The PrintDocument to be used for printing 5 private bool IsCenterOnPage; // Determine if the report will be printed in the Top-Center of the page 6 private bool IsWithTitle; // Determine if the page contain title text 7 private string TheTitleText; // The title text to be printed in each page (if IsWithTitle is set to true) 8 private Font TheTitleFont; // The font to be used with the title text (if IsWithTitle is set to true) 9 private Color TheTitleColor; // The color to be used with the title text (if IsWithTitle is set to true) 10 private bool IsWithPaging; // Determine if paging is used 11 12 static int CurrentRow; // A static parameter that keep track on which Row (in the DataGridView control) that should be printed 13 14 static int PageNumber; 15 16 private int PageWidth; 17 private int PageHeight; 18 private int LeftMargin; 19 private int TopMargin; 20 private int RightMargin; 21 private int BottomMargin; 22 23 private float CurrentY; // A parameter that keep track on the y coordinate of the page, so the next object to be printed will start from this y coordinate 24 25 private float RowHeaderHeight; 26 private List<float> RowsHeight; 27 private List<float> ColumnsWidth; 28 private float TheDataGridViewWidth; 29 30 // Maintain a generic list to hold start/stop points for the column printing 31 // This will be used for wrapping in situations where the DataGridView will not fit on a single page 32 private List<int[]> mColumnPoints; 33 private List<float> mColumnPointsWidth; 34 private int mColumnPoint; 35 36 // The class constructor 37 public DataGridViewPrinter(DataGridView aDataGridView, PrintDocument aPrintDocument, bool CenterOnPage, bool WithTitle, string aTitleText, Font aTitleFont, Color aTitleColor, bool WithPaging) 38 { 39 TheDataGridView = aDataGridView; 40 ThePrintDocument = aPrintDocument; 41 IsCenterOnPage = CenterOnPage; 42 IsWithTitle = WithTitle; 43 TheTitleText = aTitleText; 44 TheTitleFont = aTitleFont; 45 TheTitleColor = aTitleColor; 46 IsWithPaging = WithPaging; 47 48 PageNumber = 0; 49 50 RowsHeight = new List<float>(); 51 ColumnsWidth = new List<float>(); 52 53 mColumnPoints = new List<int[]>(); 54 mColumnPointsWidth = new List<float>(); 55 56 // Claculating the PageWidth and the PageHeight 57 if (!ThePrintDocument.DefaultPageSettings.Landscape) 58 { 59 PageWidth = ThePrintDocument.DefaultPageSettings.PaperSize.Width; 60 PageHeight = ThePrintDocument.DefaultPageSettings.PaperSize.Height; 61 } 62 else 63 { 64 PageHeight = ThePrintDocument.DefaultPageSettings.PaperSize.Width; 65 PageWidth = ThePrintDocument.DefaultPageSettings.PaperSize.Height; 66 } 67 68 // Claculating the page margins 69 LeftMargin = ThePrintDocument.DefaultPageSettings.Margins.Left; 70 TopMargin = ThePrintDocument.DefaultPageSettings.Margins.Top; 71 RightMargin = ThePrintDocument.DefaultPageSettings.Margins.Right; 72 BottomMargin = ThePrintDocument.DefaultPageSettings.Margins.Bottom; 73 74 // First, the current row to be printed is the first row in the DataGridView control 75 CurrentRow = 0; 76 } 77 78 // The function that calculate the height of each row (including the header row), the width of each column (according to the longest text in all its cells including the header cell), and the whole DataGridView width 79 private void Calculate(Graphics g) 80 { 81 if (PageNumber == 0) // Just calculate once 82 { 83 SizeF tmpSize = new SizeF(); 84 Font tmpFont; 85 float tmpWidth; 86 87 TheDataGridViewWidth = 0; 88 for (int i = 0; i < TheDataGridView.Columns.Count; i++) 89 { 90 tmpFont = TheDataGridView.ColumnHeadersDefaultCellStyle.Font; 91 if (tmpFont == null) // If there is no special HeaderFont style, then use the default DataGridView font style 92 tmpFont = TheDataGridView.DefaultCellStyle.Font; 93 94 tmpSize = g.MeasureString(TheDataGridView.Columns[i].HeaderText, tmpFont); 95 tmpWidth = tmpSize.Width; 96 RowHeaderHeight = tmpSize.Height; 97 98 for (int j = 0; j < TheDataGridView.Rows.Count; j++) 99 { 100 tmpFont = TheDataGridView.Rows[j].DefaultCellStyle.Font; 101 if (tmpFont == null) // If the there is no special font style of the CurrentRow, then use the default one associated with the DataGridView control 102 tmpFont = TheDataGridView.DefaultCellStyle.Font; 103 104 tmpSize = g.MeasureString("Anything", tmpFont); 105 RowsHeight.Add(tmpSize.Height); 106 107 tmpSize = g.MeasureString(TheDataGridView.Rows[j].Cells[i].EditedFormattedValue.ToString(), tmpFont); 108 if (tmpSize.Width > tmpWidth) 109 tmpWidth = tmpSize.Width; 110 } 111 if (TheDataGridView.Columns[i].Visible) 112 TheDataGridViewWidth += tmpWidth; 113 ColumnsWidth.Add(tmpWidth); 114 } 115 116 // Define the start/stop column points based on the page width and the DataGridView Width 117 // We will use this to determine the columns which are drawn on each page and how wrapping will be handled 118 // By default, the wrapping will occurr such that the maximum number of columns for a page will be determine 119 int k; 120 121 int mStartPoint = 0; 122 for (k = 0; k < TheDataGridView.Columns.Count; k++) 123 if (TheDataGridView.Columns[k].Visible) 124 { 125 mStartPoint = k; 126 break; 127 } 128 129 int mEndPoint = TheDataGridView.Columns.Count; 130 for (k = TheDataGridView.Columns.Count - 1; k >= 0; k--) 131 if (TheDataGridView.Columns[k].Visible) 132 { 133 mEndPoint = k + 1; 134 break; 135 } 136 137 float mTempWidth = TheDataGridViewWidth; 138 float mTempPrintArea = (float)PageWidth - (float)LeftMargin - (float)RightMargin; 139 140 // We only care about handling where the total datagridview width is bigger then the print area 141 if (TheDataGridViewWidth > mTempPrintArea) 142 { 143 mTempWidth = 0.0F; 144 for (k = 0; k < TheDataGridView.Columns.Count; k++) 145 { 146 if (TheDataGridView.Columns[k].Visible) 147 { 148 mTempWidth += ColumnsWidth[k]; 149 // If the width is bigger than the page area, then define a new column print range 150 if (mTempWidth > mTempPrintArea) 151 { 152 mTempWidth -= ColumnsWidth[k]; 153 mColumnPoints.Add(new int[] { mStartPoint, mEndPoint }); 154 mColumnPointsWidth.Add(mTempWidth); 155 mStartPoint = k; 156 mTempWidth = ColumnsWidth[k]; 157 } 158 } 159 // Our end point is actually one index above the current index 160 mEndPoint = k + 1; 161 } 162 } 163 // Add the last set of columns 164 mColumnPoints.Add(new int[] { mStartPoint, mEndPoint }); 165 mColumnPointsWidth.Add(mTempWidth); 166 mColumnPoint = 0; 167 } 168 } 169 170 // The funtion that print the title, page number, and the header row 171 private void DrawHeader(Graphics g) 172 { 173 CurrentY = (float)TopMargin; 174 175 // Printing the page number (if isWithPaging is set to true) 176 if (IsWithPaging) 177 { 178 PageNumber++; 179 string PageString = "Page " + PageNumber.ToString(); 180 181 StringFormat PageStringFormat = new StringFormat(); 182 PageStringFormat.Trimming = StringTrimming.Word; 183 PageStringFormat.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.LineLimit | StringFormatFlags.NoClip; 184 PageStringFormat.Alignment = StringAlignment.Far; 185 186 Font PageStringFont = new Font("Tahoma", 8, FontStyle.Regular, GraphicsUnit.Point); 187 188 RectangleF PageStringRectangle = new RectangleF((float)LeftMargin, CurrentY, (float)PageWidth - (float)RightMargin - (float)LeftMargin, g.MeasureString(PageString, PageStringFont).Height); 189 190 g.DrawString(PageString, PageStringFont, new SolidBrush(Color.Black), PageStringRectangle, PageStringFormat); 191 192 CurrentY += g.MeasureString(PageString, PageStringFont).Height; 193 } 194 195 // Printing the title (if IsWithTitle is set to true) 196 if (IsWithTitle) 197 { 198 StringFormat TitleFormat = new StringFormat(); 199 TitleFormat.Trimming = StringTrimming.Word; 200 TitleFormat.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.LineLimit | StringFormatFlags.NoClip; 201 if (IsCenterOnPage) 202 TitleFormat.Alignment = StringAlignment.Center; 203 else 204 TitleFormat.Alignment = StringAlignment.Near; 205 206 RectangleF TitleRectangle = new RectangleF((float)LeftMargin, CurrentY, (float)PageWidth - (float)RightMargin - (float)LeftMargin, g.MeasureString(TheTitleText, TheTitleFont).Height); 207 208 g.DrawString(TheTitleText, TheTitleFont, new SolidBrush(TheTitleColor), TitleRectangle, TitleFormat); 209 210 CurrentY += g.MeasureString(TheTitleText, TheTitleFont).Height; 211 } 212 213 // Calculating the starting x coordinate that the printing process will start from 214 float CurrentX = (float)LeftMargin; 215 if (IsCenterOnPage) 216 CurrentX += (((float)PageWidth - (float)RightMargin - (float)LeftMargin) - mColumnPointsWidth[mColumnPoint]) / 2.0F; 217 218 // Setting the HeaderFore style 219 Color HeaderForeColor = TheDataGridView.ColumnHeadersDefaultCellStyle.ForeColor; 220 if (HeaderForeColor.IsEmpty) // If there is no special HeaderFore style, then use the default DataGridView style 221 HeaderForeColor = TheDataGridView.DefaultCellStyle.ForeColor; 222 SolidBrush HeaderForeBrush = new SolidBrush(HeaderForeColor); 223 224 // Setting the HeaderBack style 225 Color HeaderBackColor = TheDataGridView.ColumnHeadersDefaultCellStyle.BackColor; 226 if (HeaderBackColor.IsEmpty) // If there is no special HeaderBack style, then use the default DataGridView style 227 HeaderBackColor = TheDataGridView.DefaultCellStyle.BackColor; 228 SolidBrush HeaderBackBrush = new SolidBrush(HeaderBackColor); 229 230 // Setting the LinePen that will be used to draw lines and rectangles (derived from the GridColor property of the DataGridView control) 231 Pen TheLinePen = new Pen(TheDataGridView.GridColor, 1); 232 233 // Setting the HeaderFont style 234 Font HeaderFont = TheDataGridView.ColumnHeadersDefaultCellStyle.Font; 235 if (HeaderFont == null) // If there is no special HeaderFont style, then use the default DataGridView font style 236 HeaderFont = TheDataGridView.DefaultCellStyle.Font; 237 238 // Calculating and drawing the HeaderBounds 239 RectangleF HeaderBounds = new RectangleF(CurrentX, CurrentY, mColumnPointsWidth[mColumnPoint], RowHeaderHeight); 240 g.FillRectangle(HeaderBackBrush, HeaderBounds); 241 242 // Setting the format that will be used to print each cell of the header row 243 StringFormat CellFormat = new StringFormat(); 244 CellFormat.Trimming = StringTrimming.Word; 245 CellFormat.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.LineLimit | StringFormatFlags.NoClip; 246 247 // Printing each visible cell of the header row 248 RectangleF CellBounds; 249 float ColumnWidth; 250 for (int i = (int)mColumnPoints[mColumnPoint].GetValue(0); i < (int)mColumnPoints[mColumnPoint].GetValue(1); i++) 251 { 252 if (!TheDataGridView.Columns[i].Visible) continue; // If the column is not visible then ignore this iteration 253 254 ColumnWidth = ColumnsWidth[i]; 255 256 // Check the CurrentCell alignment and apply it to the CellFormat 257 if (TheDataGridView.ColumnHeadersDefaultCellStyle.Alignment.ToString().Contains("Right")) 258 CellFormat.Alignment = StringAlignment.Far; 259 else if (TheDataGridView.ColumnHeadersDefaultCellStyle.Alignment.ToString().Contains("Center")) 260 CellFormat.Alignment = StringAlignment.Center; 261 else 262 CellFormat.Alignment = StringAlignment.Near; 263 264 CellBounds = new RectangleF(CurrentX, CurrentY, ColumnWidth, RowHeaderHeight); 265 266 // Printing the cell text 267 g.DrawString(TheDataGridView.Columns[i].HeaderText, HeaderFont, HeaderForeBrush, CellBounds, CellFormat); 268 269 // Drawing the cell bounds 270 if (TheDataGridView.RowHeadersBorderStyle != DataGridViewHeaderBorderStyle.None) // Draw the cell border only if the HeaderBorderStyle is not None 271 g.DrawRectangle(TheLinePen, CurrentX, CurrentY, ColumnWidth, RowHeaderHeight); 272 273 CurrentX += ColumnWidth; 274 } 275 276 CurrentY += RowHeaderHeight; 277 } 278 279 // The function that print a bunch of rows that fit in one page 280 // When it returns true, meaning that there are more rows still not printed, so another PagePrint action is required 281 // When it returns false, meaning that all rows are printed (the CureentRow parameter reaches the last row of the DataGridView control) and no further PagePrint action is required 282 private bool DrawRows(Graphics g) 283 { 284 // Setting the LinePen that will be used to draw lines and rectangles (derived from the GridColor property of the DataGridView control) 285 Pen TheLinePen = new Pen(TheDataGridView.GridColor, 1); 286 287 // The style paramters that will be used to print each cell 288 Font RowFont; 289 Color RowForeColor; 290 Color RowBackColor; 291 SolidBrush RowForeBrush; 292 SolidBrush RowBackBrush; 293 SolidBrush RowAlternatingBackBrush; 294 295 // Setting the format that will be used to print each cell 296 StringFormat CellFormat = new StringFormat(); 297 CellFormat.Trimming = StringTrimming.Word; 298 CellFormat.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.LineLimit; 299 300 // Printing each visible cell 301 RectangleF RowBounds; 302 float CurrentX; 303 float ColumnWidth; 304 while (CurrentRow < TheDataGridView.Rows.Count) 305 { 306 if (TheDataGridView.Rows[CurrentRow].Visible) // Print the cells of the CurrentRow only if that row is visible 307 { 308 // Setting the row font style 309 RowFont = TheDataGridView.Rows[CurrentRow].DefaultCellStyle.Font; 310 if (RowFont == null) // If the there is no special font style of the CurrentRow, then use the default one associated with the DataGridView control 311 RowFont = TheDataGridView.DefaultCellStyle.Font; 312 313 // Setting the RowFore style 314 RowForeColor = TheDataGridView.Rows[CurrentRow].DefaultCellStyle.ForeColor; 315 if (RowForeColor.IsEmpty) // If the there is no special RowFore style of the CurrentRow, then use the default one associated with the DataGridView control 316 RowForeColor = TheDataGridView.DefaultCellStyle.ForeColor; 317 RowForeBrush = new SolidBrush(RowForeColor); 318 319 // Setting the RowBack (for even rows) and the RowAlternatingBack (for odd rows) styles 320 RowBackColor = TheDataGridView.Rows[CurrentRow].DefaultCellStyle.BackColor; 321 if (RowBackColor.IsEmpty) // If the there is no special RowBack style of the CurrentRow, then use the default one associated with the DataGridView control 322 { 323 RowBackBrush = new SolidBrush(TheDataGridView.DefaultCellStyle.BackColor); 324 RowAlternatingBackBrush = new SolidBrush(TheDataGridView.AlternatingRowsDefaultCellStyle.BackColor); 325 } 326 else // If the there is a special RowBack style of the CurrentRow, then use it for both the RowBack and the RowAlternatingBack styles 327 { 328 RowBackBrush = new SolidBrush(RowBackColor); 329 RowAlternatingBackBrush = new SolidBrush(RowBackColor); 330 } 331 332 // Calculating the starting x coordinate that the printing process will start from 333 CurrentX = (float)LeftMargin; 334 if (IsCenterOnPage) 335 CurrentX += (((float)PageWidth - (float)RightMargin - (float)LeftMargin) - mColumnPointsWidth[mColumnPoint]) / 2.0F; 336 337 // Calculating the entire CurrentRow bounds 338 RowBounds = new RectangleF(CurrentX, CurrentY, mColumnPointsWidth[mColumnPoint], RowsHeight[CurrentRow]); 339 340 // Filling the back of the CurrentRow 341 if (CurrentRow % 2 == 0) 342 g.FillRectangle(RowBackBrush, RowBounds); 343 else 344 g.FillRectangle(RowAlternatingBackBrush, RowBounds); 345 346 // Printing each visible cell of the CurrentRow 347 for (int CurrentCell = (int)mColumnPoints[mColumnPoint].GetValue(0); CurrentCell < (int)mColumnPoints[mColumnPoint].GetValue(1); CurrentCell++) 348 { 349 if (!TheDataGridView.Columns[CurrentCell].Visible) continue; // If the cell is belong to invisible column, then ignore this iteration 350 351 // Check the CurrentCell alignment and apply it to the CellFormat 352 if (TheDataGridView.Columns[CurrentCell].DefaultCellStyle.Alignment.ToString().Contains("Right")) 353 CellFormat.Alignment = StringAlignment.Far; 354 else if (TheDataGridView.Columns[CurrentCell].DefaultCellStyle.Alignment.ToString().Contains("Center")) 355 CellFormat.Alignment = StringAlignment.Center; 356 else 357 CellFormat.Alignment = StringAlignment.Near; 358 359 ColumnWidth = ColumnsWidth[CurrentCell]; 360 RectangleF CellBounds = new RectangleF(CurrentX, CurrentY, ColumnWidth, RowsHeight[CurrentRow]); 361 362 // Printing the cell text 363 g.DrawString(TheDataGridView.Rows[CurrentRow].Cells[CurrentCell].EditedFormattedValue.ToString(), RowFont, RowForeBrush, CellBounds, CellFormat); 364 365 // Drawing the cell bounds 366 if (TheDataGridView.CellBorderStyle != DataGridViewCellBorderStyle.None) // Draw the cell border only if the CellBorderStyle is not None 367 g.DrawRectangle(TheLinePen, CurrentX, CurrentY, ColumnWidth, RowsHeight[CurrentRow]); 368 369 CurrentX += ColumnWidth; 370 } 371 CurrentY += RowsHeight[CurrentRow]; 372 373 // Checking if the CurrentY is exceeds the page boundries 374 // If so then exit the function and returning true meaning another PagePrint action is required 375 if ((int)CurrentY > (PageHeight - TopMargin - BottomMargin)) 376 { 377 CurrentRow++; 378 return true; 379 } 380 } 381 CurrentRow++; 382 } 383 384 CurrentRow = 0; 385 mColumnPoint++; // Continue to print the next group of columns 386 387 if (mColumnPoint == mColumnPoints.Count) // Which means all columns are printed 388 { 389 mColumnPoint = 0; 390 return false; 391 } 392 else 393 return true; 394 } 395 396 // The method that calls all other functions 397 public bool DrawDataGridView(Graphics g) 398 { 399 try 400 { 401 Calculate(g); 402 DrawHeader(g); 403 bool bContinue = DrawRows(g); 404 return bContinue; 405 } 406 catch (Exception ex) 407 { 408 MessageBox.Show("Operation failed: " + ex.Message.ToString(), Application.ProductName + " - Error", MessageBoxButtons.OK, MessageBoxIcon.Error); 409 return false; 410 } 411 } 412 } 413 }
在使用的时候，需要如下的几个方法：
Printer Related Functions
1 // 打印核心方法 2 private bool SetupThePrinting(DataGridView _datagridview) 3 { 4 PrintDialog MyPrintDialog = new PrintDialog(); 5 MyPrintDialog.AllowCurrentPage = false; 6 MyPrintDialog.AllowPrintToFile = false; 7 MyPrintDialog.AllowSelection = false; 8 MyPrintDialog.AllowSomePages = false; 9 MyPrintDialog.PrintToFile = false; 10 MyPrintDialog.ShowHelp = false; 11 MyPrintDialog.ShowNetwork = false; 12 13 if (MyPrintDialog.ShowDialog() != DialogResult.OK) 14 return false; 15 16 MyPrintDocument.DocumentName = "OMH报表"; 17 MyPrintDocument.PrinterSettings = MyPrintDialog.PrinterSettings; 18 MyPrintDocument.DefaultPageSettings = MyPrintDialog.PrinterSettings.DefaultPageSettings; 19 MyPrintDocument.DefaultPageSettings.Margins = new Margins(40, 40, 40, 40); 20 21 if (MessageBox.Show("是否要居中打印", "打印设置 - 页面居中", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes) 22 _dGVPrinter = new DataGridViewPrinter(_datagridview, MyPrintDocument, true, true, "OMH 详情", new System.Drawing.Font("宋体", 18, FontStyle.Bold, GraphicsUnit.Point), Color.Black, true); 23 else 24 _dGVPrinter = new DataGridViewPrinter(_datagridview, MyPrintDocument, false, true, "OMH 详情", new System.Drawing.Font("宋体", 18, FontStyle.Bold, GraphicsUnit.Point), Color.Black, true); 25 26 return true; 27 } 28 29 // 打印点击 30 private void 打印ToolStripMenuItem_Click(object sender, EventArgs e) 31 { 32 33 foreach (Control c in this.Controls) 34 { 35 if (c is DataGridView && c.Focused == true) 36 { 37 // Setting the style of the DataGridView control 38 (c as DataGridView).ColumnHeadersDefaultCellStyle.Font = new System.Drawing.Font("Tahoma", 9, FontStyle.Bold, GraphicsUnit.Point); 39 (c as DataGridView).ColumnHeadersDefaultCellStyle.BackColor = SystemColors.ControlDark; 40 (c as DataGridView).ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single; 41 (c as DataGridView).ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter; 42 (c as DataGridView).DefaultCellStyle.Font = new System.Drawing.Font("Tahoma", 8, FontStyle.Regular, GraphicsUnit.Point); 43 (c as DataGridView).DefaultCellStyle.BackColor = Color.Empty; 44 (c as DataGridView).AlternatingRowsDefaultCellStyle.BackColor = SystemColors.ControlLight; 45 (c as DataGridView).CellBorderStyle = DataGridViewCellBorderStyle.Single; 46 (c as DataGridView).GridColor = SystemColors.ControlDarkDark; 47 48 // Binding the DataGridViewControl to the DataSet generated above 49 //(c as DataGridView).DataSource = ds; 50 //(c as DataGridView).DataMember = "dt"; 51 52 // Changing the last column alignment to be in the Right alignment 53 (c as DataGridView).Columns[(c as DataGridView).Columns.Count - 1].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight; 54 55 // Adjusting each column to be fit as the content of all its cells, including the header cell 56 (c as DataGridView).AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCells); 57 58 59 if (SetupThePrinting(c as DataGridView)) 60 MyPrintDocument.Print(); 61 } 62 } 63 } 64 65 // MyPrintDocument 打印页事件 66 private void MyPrintDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e) 67 { 68 bool more = this._dGVPrinter.DrawDataGridView(e.Graphics); 69 if (more == true) 70 e.HasMorePages = true; 71 }
打印预览的方法：
Printing Priview
1 foreach (Control c in this.Controls) 2 { 3 if (c is DataGridView && c.Focused == true) 4 { 5 // Setting the style of the DataGridView control 6 (c as DataGridView).ColumnHeadersDefaultCellStyle.Font = new System.Drawing.Font("Tahoma", 9, FontStyle.Bold, GraphicsUnit.Point); 7 (c as DataGridView).ColumnHeadersDefaultCellStyle.BackColor = SystemColors.ControlDark; 8 (c as DataGridView).ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single; 9 (c as DataGridView).ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter; 10 (c as DataGridView).DefaultCellStyle.Font = new System.Drawing.Font("Tahoma", 8, FontStyle.Regular, GraphicsUnit.Point); 11 (c as DataGridView).DefaultCellStyle.BackColor = Color.Empty; 12 (c as DataGridView).AlternatingRowsDefaultCellStyle.BackColor = SystemColors.ControlLight; 13 (c as DataGridView).CellBorderStyle = DataGridViewCellBorderStyle.Single; 14 (c as DataGridView).GridColor = SystemColors.ControlDarkDark; 15 16 // Binding the DataGridViewControl to the DataSet generated above 17 //(c as DataGridView).DataSource = ds; 18 //(c as DataGridView).DataMember = "dt"; 19 20 // Changing the last column alignment to be in the Right alignment 21 (c as DataGridView).Columns[(c as DataGridView).Columns.Count - 1].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight; 22 23 // Adjusting each column to be fit as the content of all its cells, including the header cell 24 (c as DataGridView).AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCells); 25 26 if (SetupThePrinting(c as DataGridView)) 27 { 28 PrintPreviewDialog MyPrintPreviewDialog = new PrintPreviewDialog(); 29 MyPrintPreviewDialog.Document = this.MyPrintDocument; 30 MyPrintPreviewDialog.ShowDialog(); 31 } 32 } 33 }
5、ZedGraph实现饼图、柱状图、折线图，这个貌似资料很多了，不贴代码了。
只有一点，一种特殊的柱状图：每个BarItem上再分段的情况，实际是将柱状图的属性设定为Stack，然后分几段，就绑定几个数组。当时为了给客户显示这种，费心不少，后来才发现蛮简单的。
6、C#中DateTime与String的转化。
这个实在项目中遇到的比较头疼的一个问题，DateTime支持各种模式的输出，但是有些时候，计算时间的话，又不要从string转回DateTime，以前写了这样的一个类。现在看来，简直弱爆了。。。唉，纪念下吧，不过从string到DateTime，那些个模式串还是很烦人人，应该还会用到。
DatetimeNString
1 static class DatetimeNString 2 { 3 // 将表示时间的字符串，转化成DateTime类对象 4 public static DateTime ToDateTime(string date) 5 { 6 string[] DateTimeList = { 7 "yyyy-M-d tt hh:mm:ss", 8 "yyyy-MM-dd tt hh:mm:ss", 9 "yyyy-MM-dd HH:mm:ss", 10 "yyyy-MM-dd HH:m:ss", 11 "yyyy-MM-dd H:mm:ss", 12 "yyyy-M-dd HH:mm:ss", 13 "yyyy-M-dd H:mm:ss", 14 "yyyy-M-dd HH:m:ss", 15 "yyyy-MM-d HH:mm:ss", 16 "yyyy-MM-d H:mm:ss", 17 "yyyy-MM-d HH:m:ss", 18 "yyyy-M-d HH:mm:ss", 19 "yyyy-M-d H:mm:ss", 20 "yyyy-M-d HH:m:ss", 21 "yyyy-MM-dd HH:mm", 22 "yyyy-MM-dd H:mm", 23 "yyyy-MM-dd HH:m", 24 "yyyy-M-dd HH:mm", 25 "yyyy-M-dd H:mm", 26 "yyyy-M-dd HH:m", 27 "yyyy-MM-d HH:mm", 28 "yyyy-MM-d H:mm", 29 "yyyy-MM-d HH:m", 30 "yyyy-M-d HH:mm", 31 "yyyy-M-d H:mm", 32 "yyyy-M-d HH:m", 33 "yyyy-M-d", 34 "yyyy-MM-dd", 35 "HH:mm:ss", 36 "HH:mm;s", 37 "HH:m:ss", 38 "HH:m:s", 39 "H:mm:ss", 40 "H:mm;s", 41 "H:m:ss", 42 "H:m:s", 43 "HH:mm", 44 "HH:m", 45 "H:mm", 46 "H:m" 47 }; 48 DateTime dt = DateTime.ParseExact(date, DateTimeList, System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.AllowWhiteSpaces); 49 return dt; 50 } 51 52 // 从DateTime对象中抽取日期 53 public static string GetDate(DateTime datetime) 54 { 55 string date = datetime.Year + "-" + datetime.Month + "-" + datetime.Day; 56 return date; 57 } 58 59 // 从DateTime对象中抽取时间 60 public static string GetTime(DateTime datetime) 61 { 62 string time = datetime.Hour + ":" + datetime.Minute + ":" + datetime.Second; 63 return time; 64 } 65 66 public static int TimeCompare(string start, string end) 67 { 68 return DateTime.Compare(DatetimeNString.ToDateTime(start), DatetimeNString.ToDateTime(end)); 69 } 70 }
写着写着天亮了，就这些吧。
虽然，曾经费心苦熬出来的代码，现在看起来多少有些naive，但是，人总是这样吧，在不断的自我肯定中成长，在不断的自我否定中再进一步。
