你好，
我建议你可以使用iTextSharp插件。
这个插件可以从VS的管理Nuget程序包直接下载下来。
直接搜索就行了。
然后你可以使用如下代码来实现你的需求：
ASXP:
<div>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="id" DataSourceID="SqlDataSource1">
<Columns>
<asp:BoundField DataField="id" HeaderText="id" InsertVisible="False" ReadOnly="True" SortExpression="id" />
<asp:BoundField DataField="name" HeaderText="name" SortExpression="name" />
<asp:BoundField DataField="password" HeaderText="password" SortExpression="password" />
<asp:BoundField DataField="CityId" HeaderText="CityId" SortExpression="CityId" />
<asp:BoundField DataField="ClassId" HeaderText="ClassId" SortExpression="ClassId" />
<asp:BoundField DataField="Age" HeaderText="Age" SortExpression="Age" />
</Columns>
</asp:GridView>
<br />
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:MysqlConnectionString %>" SelectCommand="SELECT * FROM [Userinfo]"></asp:SqlDataSource>
<br />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="导出PDF" />
</div>
按钮代码：
public override void VerifyRenderingInServerForm(Control control)
{
/* Verifies that the control is rendered */
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition",
"attachment;filename=GridViewExport.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
GridView1.AllowPaging = false;
GridView1.DataBind();
GridView1.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());
Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
htmlparser.Parse(sr);
pdfDoc.Close();
Response.Write(pdfDoc);
Response.End();
}
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