转换GridView的内容到Excel里面 ---带有格式

http://www.aspsnippets.com/Articles/Export-GridView-to-Excel-in-ASPNet-with-Formatting-using-C-and-VBNet.aspx

1. HTML 页面

添加GridView控件，编辑要绑定的字段。

添加转换按钮

<div>

        <asp:GridView ID="GridView1" runat="server" AllowPaging="True" OnPageIndexChanging="GridView1_PageIndexChanging" BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px" CellPadding="3" CellSpacing="2">

            <FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />

            <HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />

            <PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />

            <RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />

            <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />

            <SortedAscendingCellStyle BackColor="#FFF1D4" />

            <SortedAscendingHeaderStyle BackColor="#B95C30" />

            <SortedDescendingCellStyle BackColor="#F1E5CE" />

            <SortedDescendingHeaderStyle BackColor="#93451F" />



            <Columns>

                <asp:BoundField DataField="Name" HeaderText="Name" />

                <asp:BoundField DataField="Address" HeaderText="Address"  />

            </Columns>

        </asp:GridView>



        <asp:Button ID="Button1" runat="server" Text="ExportToExcel" OnClick="Button1_Click"/>

    </div>

View Code

2. 添加需要的命名空间

using System.IO;

using System.Data;

using System.Drawing;

using System.Data.SqlClient;

using System.Configuration;

3. 后台绑定GridView的方法

private void BindGrid()

        {

            string strConnString = ConfigurationManager.ConnectionStrings["DemosDatabaseConnectionString"].ConnectionString;

            using (SqlConnection con = new SqlConnection(strConnString))

            {

                using (SqlCommand cmd = new SqlCommand("SELECT * FROM Customers"))

                {

                    using (SqlDataAdapter sda = new SqlDataAdapter())

                    {

                        cmd.Connection = con;

                        sda.SelectCommand = cmd;

                        using (DataTable dt = new DataTable())

                        {

                            sda.Fill(dt);

                            GridView1.DataSource = dt;

                            GridView1.DataBind();

                        }

                    }

                }

            }

        }

View Code

4. 在页面加载的时候，绑定GridView

protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                BindGrid();

            }

        }

View Code

5. 实现GridView的分页--PageIndexChanging事件

 protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)

        {

            GridView1.PageIndex = e.NewPageIndex;

            this.BindGrid();

        }

View Code

6.把GridView转换成Excel的方法

     protected void Button1_Click(object sender, EventArgs e)

        {

            Response.Clear();

            Response.Buffer = true;

            Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.xls");

            Response.Charset = "";

            Response.ContentType = "application/vnd.ms-excel";

            using (StringWriter sw = new StringWriter())

            {

                HtmlTextWriter hw = new HtmlTextWriter(sw);



                //To Export all pages

                GridView1.AllowPaging = false;

                this.BindGrid();



                GridView1.HeaderRow.BackColor = Color.White;

                foreach (TableCell cell in GridView1.HeaderRow.Cells)

                {

                    cell.BackColor = GridView1.HeaderStyle.BackColor;

                }

                foreach (GridViewRow row in GridView1.Rows)

                {

                    row.BackColor = Color.White;

                   foreach (TableCell cell in row.Cells)

                    {

                        if (row.RowIndex % 2 == 0)

                        {

                            cell.BackColor = GridView1.AlternatingRowStyle.BackColor;

                        }

                        else

                        {



                            cell.BackColor = GridView1.RowStyle.BackColor

                        }

                        cell.CssClass = "textmode";

                    }

                }



                GridView1.RenderControl(hw);

                //style to format numbers to string

                string style = @"<style> .textmode { } </style>";

                Response.Write(style);

                Response.Output.Write(sw.ToString());

                Response.Flush();

                Response.End();

            }

        }

View Code

7. 必须添加的一个事件

public override void VerifyRenderingInServerForm(Control control)

{

    /* Verifies that the control is rendered */

}