導出數據表爲Excel格式/擴展程序錯誤

我產生在ASP.Net Excel文件與下面的代碼：導出數據表爲Excel格式/擴展程序錯誤

if (dataTable.Rows.Count > 0) 
{ 
    var tw = new StringWriter(); 
    var hw = new System.Web.UI.HtmlTextWriter(tw); 
    var dgGrid = new DataGrid(); 
    dgGrid.DataSource = dataTable; 
    dgGrid.DataBind(); 
    dgGrid.RenderControl(hw); 

    attachment = "attachment; filename=" + fileName + ".xls"; 

    Response.Charset = "UTF-8"; 
    Response.ContentType = "application/vnd.ms-excel"; 
    Response.AppendHeader("content-disposition", attachment); 
    outputResponse = tw.ToString(); 
}

但是，當我想打開Excel文檔提示錯誤：

Error: excel cannot open the file .xls because the file format or file extension is not valid

如何我可以解決嗎？

來源

2013-12-12 UserStackk

你有沒有嘗試過它'Response.Charset =「UTF-8」;'？ – Koen

是的，我第一次嘗試沒有字符集，然後我得到錯誤，然後我嘗試使用字符集，並再次出現錯誤。 – UserStackk

要麼使用對Excel應用程序對象的引用來創建實際的Excel文件，請使用許多基於codeplex的項目之一來創建Excel電子表格，或者最容易地從您的數據網格創建CSV文件並返回該文件，電腦會提示他們在Excel中打開。

來源

2013-12-12 08:31:13 Dave

只是想你的代碼，到最後一行，我已經改變了異常：

var tw = new StringWriter(); 
    var hw = new System.Web.UI.HtmlTextWriter(tw); 
    var dgGrid = new DataGrid(); 
    dgGrid.DataSource = dataTable; 
    dgGrid.DataBind(); 
    dgGrid.RenderControl(hw); 

    var attachment = "attachment; filename=" + fileName + ".xls"; 

    Response.Charset = "UTF-8"; 
    Response.ContentType = "application/vnd.ms-excel"; 
    Response.AppendHeader("content-disposition", attachment); 
    // outputResponse = tw.ToString(); 
    Response.Output.Write(tw.ToString()); 
    Response.Flush(); 
    Response.End();

我的數據表是簡單的數據（字母和數字）2山坳表，它被打開這應該。

你會得到寫着消息：

The file you are trying to open'yourfilename.xls', is in a different format thahn specified by the file extension. Verify that the file is not corrupted and is from a trusted source before opening the file. Do you want to open the file now?

點擊OK後打開該文件就好了。

來源

2013-12-12 08:35:48 Koen

導出數據表爲Excel格式/擴展程序錯誤

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