从DataGrid导出Excel产生乱码的一个很好的解决方案

什么也不说了,从网上找来的,
引用自:  http://aliketen.cnblogs.com/articles/363650.html

代码如下:

        private void Export(System.Web.UI.WebControls.DataGrid dg,string fileName,string typeName)
        ...{
            System.Web.HttpResponse httpResponse = Page.Response;
            httpResponse.AppendHeader
                                  ("Content-Disposition","attachment;filename="
                                   +HttpUtility.UrlEncode(fileName,System.Text.Encoding.UTF8)); 
            httpResponse.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312");
            httpResponse.ContentType = typeName;
            System.IO.StringWriter  tw = new System.IO.StringWriter() ;
            System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
            dg.RenderControl(hw);
            string filePath = Server.MapPath("..")+fileName;
            System.IO.StreamWriter sw = System.IO.File.CreateText(filePath);
            sw.Write(tw.ToString());
            sw.Close();

            DownFile(httpResponse,fileName,filePath);
            httpResponse.End();
        }

        private  bool DownFile(System.Web.HttpResponse Response,string fileName,string fullPath)
        ...{
            try
            ...{
                Response.ContentType = "application/octet-stream";

                Response.AppendHeader("Content-Disposition","attachment;filename=" + 
                    HttpUtility.UrlEncode(fileName,System.Text.Encoding.UTF8) + ";charset=GB2312");
                System.IO.FileStream fs= System.IO.File.OpenRead(fullPath);
                long fLen=fs.Length;
                int size=102400;//每100K同时下载数据 
                byte[] readData = new byte[size];//指定缓冲区的大小 
                if(size>fLen)size=Convert.ToInt32(fLen);
                long fPos=0;
                bool isEnd=false;
                while (!isEnd) 
                ...{ 
                    if((fPos+size)>fLen)
                    ...{
                        size=Convert.ToInt32(fLen-fPos);
                        readData = new byte[size];
                        isEnd=true;
                    }
                    fs.Read(readData, 0, size);//读入一个压缩块 
                    Response.BinaryWrite(readData);
                    fPos+=size;
                } 
                fs.Close(); 
                System.IO.File.Delete(fullPath);
                return true;
            }
            catch
            ...{
                return false;
            }
        }
    }

为了方便大家Copy可以
看如下的代码,保证一样的

private void Export(System.Web.UI.WebControls.DataGrid dg,string fileName,string typeName)
{
System.Web.HttpResponse httpResponse = Page.Response;
httpResponse.AppendHeader("Content-Disposition","attachment;filename="+HttpUtility.UrlEncode(fileName,System.Text.Encoding.UTF8));
httpResponse.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312");
httpResponse.ContentType = typeName;
System.IO.StringWriter  tw = new System.IO.StringWriter() ;
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
dg.RenderControl(hw);
string filePath = Server.MapPath("..")+fileName;
System.IO.StreamWriter sw = System.IO.File.CreateText(filePath);
sw.Write(tw.ToString());
sw.Close();

DownFile(httpResponse,fileName,filePath);
httpResponse.End();
}

private  bool DownFile(System.Web.HttpResponse Response,string fileName,string fullPath)
{
try
{
Response.ContentType = "application/octet-stream";

Response.AppendHeader("Content-Disposition","attachment;filename=" +
HttpUtility.UrlEncode(fileName,System.Text.Encoding.UTF8) + ";charset=GB2312");
System.IO.FileStream fs= System.IO.File.OpenRead(fullPath);
long fLen=fs.Length;
int size=102400;//每100K同时下载数据
byte[] readData = new byte[size];//指定缓冲区的大小
if(size>fLen)size=Convert.ToInt32(fLen);
long fPos=0;
bool isEnd=false;
while (!isEnd)
{
if((fPos+size)>fLen)
{
size=Convert.ToInt32(fLen-fPos);
readData = new byte[size];
isEnd=true;
}
fs.Read(readData, 0, size);//读入一个压缩块
Response.BinaryWrite(readData);
fPos+=size;
}
fs.Close();
System.IO.File.Delete(fullPath);
return true;
}
catch
{
return false;
}
}


怎么调用?? 其实就是怎么调用Export这个函数罢了.

以上方法可以很有效地解决导出的乱码问题