在项目中一般都需要将报表数据导出到EXCEL中，但经常出现导出长串数据(如身份证)到EXCEL中后显示为科学计数法的格式，或者报表中显示为001的数据导出到Excel后成了1的格式。
下面简单介绍一下以上问题的解决方法：
1、首先，了解一下excel从web页面上导出的原理。当我们把这些数据发送到客户端时，我们想让客户端程序（浏览器）以excel的格式读
取它，所以把mime类型设为：application/vnd.ms-excel，当excel读取文件时会以每个cell的格式呈现数据，如果
cell没有规定的格式，则excel会以默认的格式去呈现该cell的数据。这样就给我们提供了自定义数据格式的空间，当然我们必须使用excel支持
的格式。下面就列出常用的一些格式：
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%
这些格式你也可以自定义，比如年月你可以定义为：yy-mm等等。那么知道了这些格式，怎么去把这些格式添加到cell中呢？下面以datagrid控件为例，介绍其格式化代码。
2、实例
1 <html xmlns="http://www.w3.org/1999/xhtml" > 2 <head runat="server"> 3 <title>导出数据到Excel</title> 4 </head> 5 <body> 6 <form id="form1" runat="server"> 7 <div> 8 9 <asp:DataGrid ID="DataGrid1" runat="server" 10 onitemdatabound="DataGrid1_ItemDataBound" > 11 </asp:DataGrid> 12 <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="导出数据到Excel" /> 13 14 </div> 15 </form> 16 </body> 17 </html>
前台
1 using System;
2 using System.Collections;
3 using System.Configuration;
4 using System.Data;
5 using System.Web;
6 using System.Web.Security;
7 using System.Web.UI;
8 using System.Web.UI.HtmlControls;
9 using System.Web.UI.WebControls;
10 using System.Web.UI.WebControls.WebParts;
11
12 namespace FLX.ComplexQuery
13 {
14 public partial class OutPutExcel : System.Web.UI.Page
15 {
16 protected void Page_Load(object sender, EventArgs e)
17 {
18 DataGrid1.DataSource = CreateDataSource();
19 DataGrid1.DataBind();
20 }
21
22 protected void Button1_Click(object sender, EventArgs e)
23 {
24 Response.Clear();
25 Response.Buffer = true;
26 Response.Charset = "GB2312";
27 Response.AppendHeader("Content-Disposition", "attachment;filename=FileName.xls");
28 Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文
29 Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。
30 this.EnableViewState = false;
31 System.Globalization.CultureInfo myCItrad = new System.Globalization.CultureInfo("ZH-CN", true);
32 System.IO.StringWriter oStringWriter = new System.IO.StringWriter(myCItrad);
33 System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
34 this.DataGrid1.RenderControl(oHtmlTextWriter);
35 Response.Write(oStringWriter.ToString());
36 Response.End();
37 }
38
39 ICollection CreateDataSource()
40 {
41
42 DataTable dt = new DataTable();
43 DataRow dr;
44 dt.Columns.Add(new DataColumn("身份证号码", typeof(string)));
45 dt.Columns.Add(new DataColumn("图书单价", typeof(decimal)));
46 dt.Columns.Add(new DataColumn("购买数量", typeof(Int32)));
47 dt.Columns.Add(new DataColumn("总价格", typeof(decimal)));
48 for (int i = 0; i < 30; i++)
49 {
50 dr = dt.NewRow();
51
52 dr[0] = "123456789123456789";
53 dr[1] = 100 * i / 3.0;
54 dr[2] = i + 5;
55 dr[3] = (decimal)dr[1] * (Int32)dr[2];
56 dt.Rows.Add(dr);
57 }
58 DataView dv = new DataView(dt);
59 return dv;
60 }
61
62 protected void DataGrid1_ItemDataBound(object sender, DataGridItemEventArgs e)
63 {
64 if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
65 {
66 //将整个datagrid都格式化为文本格式
67 int datagridcolumns; //datagrid显示列的数量,
68 //获取显示列的数量可以从数据源那里进行获取
69 //比如绑定DataGrid的数据源是DataSet
70 //datagrid显示列的数量 = ds.tables[0].Columns.Count;
71 for (int i = 0; i < datagridcolumns; i++)
72 {
73 e.Item.Cells[i].Attributes.Add("style", "vnd.ms-excel.numberformat:@");
74 }
75
76 //对需要格式化的列进行格式化
77 //e.Item.Cells[0].Attributes.Add("style", "vnd.ms-excel.numberformat:@");
78 //e.Item.Cells[2].Attributes.Add("style", "vnd.ms-excel.numberformat::#,##0.00");
79 // e.Item.Cells[3].Attributes.Add("style", "vnd.ms-excel.numberformat:￥#,###.00");
80 }
81 }
82 }
83 }
后台
3、动态绑定数据源示例
//导出
function GetExcel() {
var model = {};
model.CompanyName = mini.get("CompanyName").getValue();
model.DateFrom = mini.get("DateFrom").getValue();
model.DateTo = mini.get("DateTo").getValue();
var json = mini.encode(model);
window.open("EntReport/SoftwareRP/Export?model=" + json);
}
前台js方法
1 /// <summary>
2 /// 导出Excel
3 /// </summary>
4 /// <param name="model"></param>
5 public void Export(string model)
6 {
7 DataTable table = new DataTable();
8 Dictionary<string, string> dic = new Dictionary<string, string>();
9 JavaScriptSerializer js = new JavaScriptSerializer();
10 dic = js.Deserialize<Dictionary<string, string>>(model);
11 System.Data.DataSet ds = new ZhishiPatent_BLL().QueryDataSet(dic);
12 table = ds.Tables[0];
13
14 Response.Clear();
15 Response.Buffer = true;
16 Response.Charset = "GB2312";//UTF-8
17 Response.AppendHeader("Content-Disposition", "attachment;filename=" + "知识专利统计.xls");
18 Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
19 Response.ContentType = "application/ms-excel";
20 Response.Write(ImportToExcel(table));
21 Response.End();
22 }
23 /// <summary>
24 /// 设置样式
25 /// </summary>
26 /// <param name="table"></param>
27 /// <returns></returns>
28 private string ImportToExcel(DataTable table)
29 {
30 System.Text.StringBuilder sb = new System.Text.StringBuilder();
31 DataGrid gv = new DataGrid();
32 gv.ItemDataBound += new DataGridItemEventHandler(gv_ItemDataBound);
33 gv.AlternatingItemStyle.BackColor = System.Drawing.Color.White;
34 gv.AlternatingItemStyle.ForeColor = System.Drawing.Color.FromArgb(40, 71, 117);
35 gv.HeaderStyle.BackColor = System.Drawing.Color.FromArgb(93, 123, 157);
36 gv.HeaderStyle.Font.Bold = true;
37 gv.HeaderStyle.ForeColor = System.Drawing.Color.White;
38 gv.HeaderStyle.VerticalAlign = VerticalAlign.Middle;
39 gv.HeaderStyle.HorizontalAlign = HorizontalAlign.Center;
40 gv.ItemStyle.BackColor = System.Drawing.Color.FromArgb(247, 246, 233);
41 gv.ItemStyle.ForeColor = System.Drawing.Color.FromArgb(51, 51, 51);
42 gv.DataSource = table;
43 gv.DataBind();
44 System.IO.StringWriter oStringWriter = new System.IO.StringWriter(new System.Globalization.CultureInfo("zh-CN"));
45 System.Web.UI.HtmlTextWriter ht = new System.Web.UI.HtmlTextWriter(oStringWriter);
46 gv.RenderControl(ht);
47 return oStringWriter.ToString();
48 }
49
50 private void gv_ItemDataBound(object sender, DataGridItemEventArgs e)
51 {
52 if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
53 {
54 foreach (TableCell item in e.Item.Cells)
55 {
56 item.Attributes.Add("style", "vnd.ms-excel.numberformat: @");
57
58 }
59 e.Item.Cells[5].HorizontalAlign = HorizontalAlign.Right;
60 }
61
62 }
后台
.net解决数据导出excel时的格式问题
时间： 2024-10-10 17:36:20