在Sharepoint自定義Web部件中導出為PDF

Question

我想將我的頁面導出到Sharepoint Custm Web部件中的pdf。 我正在使用下面的代碼導出為pdf。 當我單擊導出按鈕時，我得到以下錯誤。 如何解決這個錯誤？ 請幫我。

碼

protected void ExporttoPDF_Click(object sender, EventArgs e)
{
        Response.ContentType = "application/pdf";
        Response.AddHeader("content-disposition", "attachment;filename=ExporttoPDF.pdf");
        Response.Cache.SetCacheability(HttpCacheability.NoCache);
        StringWriter sw = new StringWriter();
        HtmlTextWriter hw = new HtmlTextWriter(sw);
        this.Page.RenderControl(hw);
        StringReader sr = new StringReader(sw.ToString());
        Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f);
        HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
        PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
        pdfDoc.Open();
        htmlparser.Parse(sr);
        pdfDoc.Close();
        Response.Write(pdfDoc);
        Response.End();
}

錯誤

“ /”應用程序中的服務器錯誤。 只能在Render（）期間調用RegisterForEventValidation； 說明：執行當前Web請求期間發生未處理的異常。 請查看堆棧跟蹤，以獲取有關錯誤及其在代碼中起源的更多信息。

Exception Details: System.InvalidOperationException: 
RegisterForEventValidation can only be called during Render();

源錯誤：

當前Web請求的執行期間生成了未處理的異常。 可以使用下面的異常堆棧跟蹤來標識有關異常的來源和位置的信息。

堆棧跟蹤：

[InvalidOperationException: RegisterForEventValidation can only be called during Render();]
   System.Web.UI.ClientScriptManager.RegisterForEventValidation(String uniqueId, String argument) +11081278
   System.Web.UI.WebControls.TextBox.AddAttributesToRender(HtmlTextWriter writer) +455
   System.Web.UI.WebControls.WebControl.RenderBeginTag(HtmlTextWriter writer) +27
   System.Web.UI.WebControls.TextBox.Render(HtmlTextWriter writer) +27
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240
   System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +42
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +411
   System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +87
   System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +53
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240
   System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +42
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240
   System.Web.UI.Page.Render(HtmlTextWriter writer) +38
   Microsoft.SharePoint.WebPartPages.WikiEditPage.Render(HtmlTextWriter writer) +207
   PayrollProject.PaySlip4Employee.PaySlip4EmployeeUserControl.btnPDF_Click(Object sender, EventArgs e) +425
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +115
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +140
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +29
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2981

版本信息：Microsoft .NET Framework版本：2.0.50727.5472； ASP.NET版本：2.0.50727.5474

Answer 1

將此添加到@Page指令中

EnableEventValidation ="false"

喜歡

<%@ Page Language="C#" AutoEventWireup="true" Debug ="true" EnableEventValidation ="false" CodeFile="Default.aspx.cs" Inherits="_Default" %>