GridView输入Excel时出现"System.OutOfMemoryException: Out of memory"及其解决方案。

一般我们用GridView输出Excel是，代码都是这样写的：

Response.Clear(); 

Response.AddHeader("content-disposition", "attachment;filename="+filename+".xls");

Response.Charset = "";

this.EnableViewState=false;

Response.Cache.SetCacheability(HttpCacheability.NoCache);

Response.ContentType = "application/vnd.xls";



System.IO.StringWriter stringWrite = new System.IO.StringWriter();

System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);



DataGrid myDataGrid=new DataGrid();



myDataGrid.DataSource=dsReport.Tables[1];

myDataGrid.DataBind();



myDataGrid.RenderControl(htmlWrite);

Response.Write(stringWrite.ToString());



Response.End();

 

当gridview的数据比较大的时候，会出现 System.OutOfMemoryException: Out of memory的错误。

解决的方法当然是减少内存的空间的占用量。

一下是从网上搜来的解决方案：

Response.Clear(); 

Response.AddHeader("content-disposition", "attachment;filename="+filename+".xls");

Response.Charset = "";

this.EnableViewState=false;

Response.Cache.SetCacheability(HttpCacheability.NoCache);

Response.ContentType = "application/vnd.xls";



System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(Response.Output);



DataGrid myDataGrid=new DataGrid();

myDataGrid.DataSource=dsReport.Tables[1];

myDataGrid.DataBind();

myDataGrid.RenderControl(htmlWrite);



Response.End();



/*

This should divide the memory required by the actual report output HTML by 3, because before you were storing the entire thing in memory a total of at least three times before:

- In the StringBuilder

- In the String from the StringBuilder.ToString()

- In the Response object

*/