。net 自动导出excel

#region 自动保存excel 
/// <summary> 
/// winform生成Excle文件并保存到指定位置 
/// </summary> 
/// <param name="dt">数据源</param> 
/// <param name="saveFileName">生成Excel文件名</param> 
public void ExportToExcel(DataTable dt, string saveFileName) 
{ 
if (dt == null) return; 
Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application(); 
if (xlApp == null) 
{ 
// lblMsg.Text = "无法创建Excel对象，可能您的机子未安装Excel"; 
MessageBox.Show("请确保您的电脑已经安装Excel", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Error); 
return; 
} 
Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks; 
Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet); 
Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1]; //取得sheet1 
Microsoft.Office.Interop.Excel.Range range = null; 
long totalCount = dt.Rows.Count; 
long rowRead = 0; 
float percent = 0; 


//写入标题 
for (int i = 0; i < dt.Columns.Count; i++) 
{ 
worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName; 
range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]; 
//range.Interior.ColorIndex = 15;//背景颜色 
range.Font.Bold = true; //粗体 
range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter; //居中 
//加边框 
//range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, 
// Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); 
//range.ColumnWidth = 4.63;//设置列宽 
//range.EntireColumn.AutoFit();//自动调整列宽 
//r1.EntireRow.AutoFit();//自动调整行高 
} 
//写入内容 
for (int r = 0; r < dt.Rows.Count; r++) 
{ 
for (int i = 0; i < dt.Columns.Count; i++) 
{ 
try 
{ 
worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i]; 


range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[r + 2, i + 1]; 
range.Font.Size = 9; //字体大小 
//加边框 
//range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, 
// Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); 
range.EntireColumn.AutoFit(); //自动调整列宽 
} 
catch (Exception) 
{ 
} 
} 
rowRead++; 
percent = ((float)(100 * rowRead)) / totalCount; 
Application.DoEvents(); 
} 


range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin; 
if (dt.Columns.Count > 1) 
{ 
range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin; 
} 


try 
{ 
workbook.Saved = true; 
//workbook.Saved = true; 
workbook.SaveCopyAs(saveFileName); 
} 
catch (Exception ex) 
{ 
MessageBox.Show("导出文件时出错,文件可能正被打开!", "系统信息"); 
} 
workbooks.Close(); 
if (xlApp != null) 
{ 
xlApp.Workbooks.Close(); 
xlApp.Quit(); 
int generation = GC.GetGeneration(xlApp); 
System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp); 
xlApp = null; 
GC.Collect(generation); 
} 
GC.Collect(); //强行销毁 


#region 强行杀死最近打开的Excel进程 


System.Diagnostics.Process[] excelProc = System.Diagnostics.Process.GetProcessesByName("EXCEL"); 
DateTime startTime = new DateTime(); 
int m, killId = 0; 
for (m = 0; m < excelProc.Length; m++) 
{ 
if (startTime < excelProc[m].StartTime) 
{ 
startTime = excelProc[m].StartTime; 
killId = m; 
} 
} 
if (excelProc[killId].HasExited == false) 
{ 
excelProc[killId].Kill(); 
} 


#endregion 
} 
#endregion