asp.net导出excel科学计数问题
方法一：
在asp.net 中 我一般都是将要导出的数据放到gridview网格里，首先对网格邦定数据时 字符串形式处理，然后再用普通的形式导出excel就把问题解决了。 我的代码非常简单：在邦定gridview控件时在rowdatabound事件中队数据格式化 protected void gError_RowDataBound(object sender, GridViewRowEventArgs e) { //1） 文本：vnd.ms-excel.numberformat:@ //2） 日期：vnd.ms-excel.numberformat:yyyy/mm/dd //3） 数字：vnd.ms-excel.numberformat:#,##0.00 //4） 货币：vnd.ms-excel.numberformat:￥#,##0.00 //5） 百分比：vnd.ms-excel.numberformat: #0.00% for (int i = 0; i < e.Row.Cells.Count; i++) { if (e.Row.RowType == DataControlRowType.DataRow) e.Row.Cells[i ].Attributes.Add("style", "vnd.ms-excel.numberformat:@"); } } 然后执行到处操作就不会出现问题了 protected void btnOut_Click(object sender, EventArgs e) { Response.Clear(); Response.Buffer = true; Response.Charset = "GB2312"; Response.AppendHeader("Content-Disposition", "attachment;filename=FileName.xls"); Response.ContentEncoding = System.Text.Encoding.UTF7; //设置输出文件类型为excel文件。 Response.ContentType = "application/ms-excel"; System.IO.StringWriter oStringWriter = new System.IO.StringWriter(); System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter); this.gError.RenderControl(oHtmlTextWriter); Response.Output.Write(oStringWriter.ToString()); Response.Flush(); Response.End(); } public override void VerifyRenderingInServerForm(Control control) { //base.VerifyRenderingInServerForm(control); } 在winform程序开发时，处理的办法就是在导出的过程中，开始试了 处理excel对象的格式 mysheet.Cells.NumberFormat = "#"; 后来没有成功。最后还是用了逐条纪录进行字符格式转化的方法，即添加“ ' ”. 我写得代码主要部分如下 执行数据导出#region 执行数据导出 try { //到导出excel Excel.ApplicationClass my = new Excel.ApplicationClass(); if (my == null) { MessageBox.Show("无法创建excel对象，可能您的系统没有安装excel"); return; } my.Visible = false; Excel.Workbook mybook = (Excel.Workbook)my.Workbooks.Add(1); ((Excel.Worksheet)mybook.Worksheets[1]).Name = "sheet1"; Excel.Worksheet mysheet = (Excel.Worksheet)mybook.Worksheets[1]; // mysheet.Cells.NumberFormat = "#"; //导出列名 for (int j = 0; j < this.dgvShow.Columns.Count; j++) { if (this.dgvShow.Columns[j].Visible == true) { mysheet.Cells[1, j + 1] = "'" + Convert.ToString(this.dgvShow.Columns[j].HeaderText);//加"'"防止科 学计数法 } } //导出数据 for (int i = 0; i < this.dgvShow.Rows.Count; i++) { for (int j = 0; j < this.dgvShow.Columns.Count; j++) { mysheet.Cells[i + 2, j + 1] = "'" + Convert.ToString(this.dgvShow.Rows[i].Cells[j].Value); } } if (savefilename != "") { try { //mybook.Save(); mybook.SaveCopyAs(savefilename); MessageBox.Show("excel文件导出成功！"); } catch (Exception ex) { MessageBox.Show("导出文件出现错误，文件可能正被打开！\n" + ex.Message); } } GC.Collect(); } catch (Exception ex) { MessageBox.Show("数据导出时出现错误，一下是详细错误信息：\n" + ex.Message); return; } #endregion
方法2：
using System; 2using System.Collections; 3using System.ComponentModel; 4using System.Data; 5using System.Drawing; 6using System.Web; 7using System.Web.SessionState; 8using System.Web.UI; 9using System.Web.UI.WebControls; 10using System.Web.UI.HtmlControls; 11 12namespace eMeng.Exam 13{ 14/**//// <summary> 15/// OutPutExcel 的摘要说明。 16/// </summary> 17public class OutPutExcel : System.Web.UI.Page 18{ 19protected System.Web.UI.WebControls.Button Button1; 20protected System.Web.UI.WebControls.DataGrid DataGrid1; 21 22private void Page_Load(object sender, System.EventArgs e) 23{ 24// 在此处放置用户代码以初始化页面 25DataGrid1.DataSource=CreateDataSource(); 26DataGrid1.DataBind(); 27} 28/**//// <summary> 29/// 创建数据源 30/// </summary> 31/// <returns>DataView</returns> 32ICollection CreateDataSource() 33{ 34 35DataTable dt = new DataTable(); 36DataRow dr; 37dt.Columns.Add(new DataColumn("身份证号码", typeof(string))); 38dt.Columns.Add(new DataColumn("图书单价",typeof(decimal))); 39dt.Columns.Add(new DataColumn("购买数量",typeof(Int32))); 40dt.Columns.Add(new DataColumn("总价格",typeof(decimal))); 41 42 43for (int i = 0; i < 30; i++) 44{ 45dr = dt.NewRow(); 46 47dr[0] = "123456789123456789"; 48dr[1] = 100 * i /3.0; 49dr[2] = i + 5; 50dr[3] = (decimal)dr[1] * (Int32)dr[2]; 51dt.Rows.Add(dr); 52} 53DataView dv = new DataView(dt); 54return dv; 55} 56/**//// <summary> 57/// 输出到Excel 58/// </summary> 59/// <param name="sender"></param> 60/// <param name="e"></param> 61private void Button1_Click(object sender, System.EventArgs e) 62{ 63Response.Clear(); 64Response.Buffer= true; 65Response.Charset="GB2312"; 66Response.AppendHeader("Content-Disposition","attachment;filename=FileName.xls"); 67Response.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文 68Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。 69this.EnableViewState = false; 70System.Globalization.CultureInfo myCItrad = new System.Globalization.CultureInfo("ZH-CN",true); 71System.IO.StringWriter oStringWriter = new System.IO.StringWriter(myCItrad); 72System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter); 73this.DataGrid1.RenderControl(oHtmlTextWriter); 74Response.Write(oStringWriter.ToString()); 75Response.End(); 76} 77 78Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码 79override protected void OnInit(EventArgs e) 80{ 81// 82// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。 83// 84InitializeComponent(); 85base.OnInit(e); 86} 87 88/**//// <summary> 89/// 设计器支持所需的方法 - 不要使用代码编辑器修改 90/// 此方法的内容。 91/// </summary> 92private void InitializeComponent() 93{ 94this.Button1.Click += new System.EventHandler(this.Button1_Click); 95this.DataGrid1.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.DataGrid1_ItemDataBound); 96this.Load += new System.EventHandler(this.Page_Load); 97 98} 99#endregion 100 101private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e) 102{ 103if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) 104{ 105e.Item.Cells[0].Attributes.Add("style","vnd.ms-excel.numberformat:@"); 106e.Item.Cells[3].Attributes.Add("style","vnd.ms-excel.numberformat:￥#,###.00"); } } } }
方法3：通过CSS
<style type="text/css"> <!-- td { background-color: #FFFFFF; } .txt {padding-top:1px; padding-right:1px; padding-left:1px; mso-ignore:padding; color:black; font-size:11.0pt; font-weight:400; font-style:normal; text-decoration:none; font-family:宋体; mso-generic-font-family:auto; mso-font-charset:134; mso-number-format:"\@"; text-align:general; vertical-align:middle; mso-background-source:auto; mso-pattern:auto; white-space:nowrap;} --> </style>
