下面是我的具体实现代码,但是在本机中调试导出数据没有问题,但是在另一台机子访问主机导出时就出现了这样的问题:/”应用程序中的服务器错误。
--------------------------------------------------------------------------------无法使用前导 .. 在顶级目录上退出。
说明: 执行当前 Web 请求期间,出现未处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.Web.HttpException: 无法使用前导 .. 在顶级目录上退出。源错误:
行 130: System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);
行 131: dg.RenderControl(hw);
行 132: string filePath = Server.MapPath("..")+fileName;
行 133: System.IO.StreamWriter sw = System.IO.File.CreateText(filePath);
行 134: sw.Write(tw.ToString());
源文件: c:\inetpub\wwwroot\managesystem\manageform.aspx.cs 行: 132 堆栈跟踪:
[HttpException (0x80004005): 无法使用前导 .. 在顶级目录上退出。]
System.Web.Util.UrlPath.Reduce(String path) +701
System.Web.Util.UrlPath.Combine(String basepath, String relative) +304
System.Web.HttpRequest.MapPath(String virtualPath, String baseVirtualDir, Boolean allowCrossAppMapping) +201
System.Web.HttpServerUtility.MapPath(String path) +60
ManageSystem.ManageForm.Export(DataGrid dg, String fileName, String typeName) in c:\inetpub\wwwroot\managesystem\manageform.aspx.cs:132
ManageSystem.ManageForm.Button1_Click(Object sender, EventArgs e) in c:\inetpub\wwwroot\managesystem\manageform.aspx.cs:119
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +108
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +57
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +18
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain() +1277
我的代码:
private void Button1_Click(object sender, System.EventArgs e)
{
Export(DataGridView,"GoodsList.xls","application/ms-excel");
}
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;
}
}
--------------------------------------------------------------------------------无法使用前导 .. 在顶级目录上退出。
说明: 执行当前 Web 请求期间,出现未处理的异常。请检查堆栈跟踪信息,以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.Web.HttpException: 无法使用前导 .. 在顶级目录上退出。源错误:
行 130: System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);
行 131: dg.RenderControl(hw);
行 132: string filePath = Server.MapPath("..")+fileName;
行 133: System.IO.StreamWriter sw = System.IO.File.CreateText(filePath);
行 134: sw.Write(tw.ToString());
源文件: c:\inetpub\wwwroot\managesystem\manageform.aspx.cs 行: 132 堆栈跟踪:
[HttpException (0x80004005): 无法使用前导 .. 在顶级目录上退出。]
System.Web.Util.UrlPath.Reduce(String path) +701
System.Web.Util.UrlPath.Combine(String basepath, String relative) +304
System.Web.HttpRequest.MapPath(String virtualPath, String baseVirtualDir, Boolean allowCrossAppMapping) +201
System.Web.HttpServerUtility.MapPath(String path) +60
ManageSystem.ManageForm.Export(DataGrid dg, String fileName, String typeName) in c:\inetpub\wwwroot\managesystem\manageform.aspx.cs:132
ManageSystem.ManageForm.Button1_Click(Object sender, EventArgs e) in c:\inetpub\wwwroot\managesystem\manageform.aspx.cs:119
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +108
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +57
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +18
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain() +1277
我的代码:
private void Button1_Click(object sender, System.EventArgs e)
{
Export(DataGridView,"GoodsList.xls","application/ms-excel");
}
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;
}
}
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