C# 生成excel将清除viewbag/tempdata
我正在尝试用以下代码生成excelC# 生成excel将清除viewbag/tempdata,c#,asp.net,excel,asp.net-mvc,viewbag,C#,Asp.net,Excel,Asp.net Mvc,Viewbag,我正在尝试用以下代码生成excel public void GenerateExcel(string reportName, DataTable dt) { Response.Clear(); Response.ClearContent(); Response.ClearHeaders(); Response.Buffer = true; Re
public void GenerateExcel(string reportName, DataTable dt)
{
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.Buffer = true;
Response.ContentType = "application/ms-excel";
Response.Write(@"<!DOCTYPE HTML PUBLIC ""-//W3C//DTD HTML 4.0 Transitional//EN"">");
Response.AddHeader("Content-Disposition", "attachment;filename= " + reportName + ".xls");
Response.Charset = "utf-8";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("windows-1250");
StringWriter ws = new StringWriter();
ws.Write("<font style='font-size:10.0pt; font-family:Calibri;'>");
// ws.Write("<BR><BR><BR>");
//sets the table border, cell spacing, border color, font of the text, background, foreground, font height
ws.Write("<Table border='1' bgColor='#ffffff' " +
"borderColor='#000000' cellSpacing='0' cellPadding='0' " +
"style='font-size:10.0pt; font-family:Calibri; background:white;'>");
string strBoldCell = "<TD bgColor='#c9c7c3' style=\"font-weight: bold\">{0}</TD>";
string strRedCell = "<TD style=\"background-color:#ff4d4d\">{0}</TD>";
string strCell = "<TD>{0}</TD>";
string strColSpan = "<TD colspan={0} style=\"font-weight: bold\">{1}</TD>";
int r;
int c;
if (dt.Rows.Count > 0)
{
try
{
ws.Write("<TR>");
for (c = 0; c < dt.Columns.Count; c++)
{
ws.Write(string.Format(strBoldCell, dt.Columns[c].ColumnName).Replace("_", "‌"));
}
ws.Write("</TR>");
ws.Write("\n");
for (r = 0; r < dt.Rows.Count; r++)
{
ws.Write("<TR>");
for (c = 0; c < dt.Columns.Count; c++)
{
if (string.IsNullOrEmpty(dt.Rows[r][dt.Columns[c].ColumnName].ToString()) == false)
{
if (dt.Rows[r]["Comment"].ToString() != null && dt.Rows[r]["Comment"].ToString() != "")
{
ws.Write(string.Format(strRedCell, dt.Rows[r][dt.Columns[c].ColumnName].ToString().Replace('_', ' ')));
}
else
{
ws.Write(string.Format(strCell, dt.Rows[r][dt.Columns[c].ColumnName].ToString().Replace('_', ' ')));
}
}
else
{
if (dt.Rows[r]["Comment"].ToString() != null && dt.Rows[r]["Comment"].ToString() != "")
{
ws.Write(string.Format(strRedCell, " "));
}
else
{
ws.Write(string.Format(strCell, " "));
}
}
}
ws.Write("</TR>");
ws.Write("\n");
}
}
catch (Exception ex)
{
throw ex;
}
}
else
{
ws.Write("<Tr>");
ws.Write(string.Format(strColSpan, 10, "No records found"));
ws.Write("</Tr>");
}
ws.Write("</Table>");
ws.Write("</Font>");
Response.Write(ws.ToString());
Response.Flush();
Response.End();
}
如果我对调用GenerateExcel方法tempdata的代码进行注释，则该代码在视图中完全显示。为什么会出现这种情况？请在设置tempdata之前尝试移动调用函数，如：
GenerateExcel("OutputFile" + DateTime.Now.ToString("MMddyyyyhhmmss"), result);
if (Cnt != 0)
{
TempData["Error"] = "There were issues with the Excel Import: Total Records: " + result.Rows.Count+" Error Row Count: "+Cnt;
}
else
{
TempData["Error"] = "No error found in given excel: Total Records: " + result.Rows.Count;
}
return View();
您正在GenerateExcel方法中结束响应，并尝试在结束响应后返回视图。您需要更改方法。此方法是否异步并多次调用？
GenerateExcel("OutputFile" + DateTime.Now.ToString("MMddyyyyhhmmss"), result);
if (Cnt != 0)
{
TempData["Error"] = "There were issues with the Excel Import: Total Records: " + result.Rows.Count+" Error Row Count: "+Cnt;
}
else
{
TempData["Error"] = "No error found in given excel: Total Records: " + result.Rows.Count;
}
return View();