禁用GridView 分页然后渲染。您可能还需要进行绑定。
protected void ExporttoExcel(object sender, EventArgs e)
{
Response.Clear();
Response.AddHeader("content-disposition", "attachment; filename=Report.xls");
Response.ContentType = "application/vnd.xls";
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
// ************************
GridView1.AllowPaging = false; // <- disable paging then render
// also do the binding
GridView1.DataSource = myDataSource;
GridView1.DataBind();
// ************************
GridView1.RenderControl(htmlWrite);
Response.Write(stringWrite.ToString());
Response.End();
}
编辑（工作示例）
ASPX（GridView 和导出 Button）：
<asp:GridView ID="grd1" runat="server" AllowPaging="true" PageSize="10" AutoGenerateColumns="false" OnPageIndexChanging="grd1_PageIndexChanging">
<Columns>
<asp:BoundField DataField="StudentID" HeaderText="Student ID" />
<asp:BoundField DataField="StudentName" HeaderText="Student Name" />
<asp:BoundField DataField="FatherName" HeaderText="Father Name" />
</Columns>
</asp:GridView>
<asp:Button ID="btnExport" runat="server" Text="Export" OnClick="btnExport_Click" />
代码背后：
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
this.BindGridView();
}
}
private void BindGridView()
{
using (var dtStudent = this.GetStudentData())
{
this.grd1.DataSource = dtStudent;
this.grd1.DataBind();
}
}
private DataTable GetStudentData()
{
var dtStudent = new DataTable();
dtStudent.Columns.Add("StudentID");
dtStudent.Columns.Add("StudentName");
dtStudent.Columns.Add("FatherName");
for (int i = 0; i < 20; i++)
{
var sIndex = i.ToString("00");
dtStudent.Rows.Add("Student-" + sIndex, "Name-" + sIndex, "Father-" + sIndex);
}
return dtStudent;
}
protected void grd1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
this.grd1.PageIndex = e.NewPageIndex;
this.BindGridView();
}
protected void ExporttoExcel()
{
Response.Clear();
Response.AddHeader("content-disposition", "attachment; filename=Report.xls");
Response.ContentType = "application/vnd.xls";
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
// ************************
this.grd1.AllowPaging = false; // <- disable paging then render
this.BindGridView();
// ************************
this.grd1.RenderControl(htmlWrite);
Response.Write(stringWrite.ToString());
Response.End();
}
public override void VerifyRenderingInServerForm(Control control)
{
//base.VerifyRenderingInServerForm(control);
}
protected override void Render(HtmlTextWriter writer)
{
if (this._Export)
this.ExporttoExcel();
else
base.Render(writer);
}
private bool _Export = false;
protected void btnExport_Click(object sender, EventArgs e)
{
this._Export = true;
}