Asp.net 将GridView导出到Excel时System.OutOfMemoryException

我有一个将ASP Gridview导出到excel的sub，它工作正常，但是，当有大量行时，我收到以下错误：

Exception of type 'System.OutOfMemoryException' was thrown. 

有什么办法解决这个问题吗？以下是我导出到excel的子项：

Protected Sub btnExportMonthlyUK_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExportMonth.Click
    Dim title As String
    title = "MonthlyReportUK"

    Response.Clear()
    Response.AddHeader("content-disposition", String.Format("attachment;filename={0}.xls", title))
    Response.Charset = ""
    Response.ContentType = "application/vnd.xls"
    Response.ContentEncoding = Encoding.Unicode
    Response.BinaryWrite(Encoding.Unicode.GetPreamble())
    Dim strWr As New StringWriter()
    Dim HtmlWr As New HtmlTextWriter(strWr)
    monthlyReportsIE.AllowPaging = False
    monthlyReportsIE.DataBind()
    monthlyReportsIE.RenderControl(HtmlWr)
    Response.Write(strWr.ToString())
    Response.End()
End Sub

如果在您的情况下无效，那么您应该考虑外部的库来执行该作业，因为输出大型Excel文件作为HTML是内存消耗。

---

检查此示例以了解如何操作。

您可以尝试使用

StreamWriter

将控件直接呈现到输出流，并避免在内存中创建大字符串。
您还可以尝试将

Response.Buffer

设置为

False

，服务器将直接将输出发送到客户端已处理

Protected Sub btnExportMonthlyUK_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnExportMonth.Click
    Dim title As String
    title = "MonthlyReportUK"

    Response.Clear()
    Response.AddHeader("content-disposition", String.Format("attachment;filename={0}.xls", title))
    Response.Charset = ""
    Response.ContentType = "application/vnd.xls"
    Response.ContentEncoding = Encoding.Unicode
    Response.BinaryWrite(Encoding.Unicode.GetPreamble())
    Response.Buffer = False

    monthlyReportsIE.AllowPaging = False
    monthlyReportsIE.DataBind()

    Using strWr As new StreamWriter(response.OutputStream)
       Using htmlWr As new HtmlTextWriter(strWr)
           monthlyReportsIE.RenderControl(htmlWr)
       End Using 
    End Using 

    Response.End()
End Sub

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非常感谢您的回复！这看起来是可行的，除了excel工作表以类似于汉字的方式打开外，有没有办法解决这个问题？@neeko请尝试将所需的编码指定给