how to export sql table to excel without loss your formatting? - asp.net

Question

I want export sql table to excel file.
my Code:
public void ExportToExcel(string strQuery)
{
//Get the data from database into datatable
OleDbCommand cmd = new OleDbCommand(strQuery);
DataTable dt = GetData(cmd);
//Create a dummy GridView
GridView GridView1 = new GridView();
GridView1.AllowPaging = false;
GridView1.DataSource = dt;
GridView1.DataBind();
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.Buffer = true;
HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.xls");
HttpContext.Current.Response.Charset = "";
HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
for (int i = 0; i < GridView1.Rows.Count; i++)
{
//Apply text style to each Row
GridView1.Rows[i].Attributes.Add("class", "textmode");
}
GridView1.RenderControl(hw);
//style to format numbers to string
string style = #"<style> .textmode { mso-number-format:\#; } </style>";
HttpContext.Current.Response.Write(style);
HttpContext.Current.Response.Output.Write(sw.ToString());
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.End();
}
and In Button of aspx page:
protected void ExportToExcel(object sender, EventArgs e)
{
ExportClass Exc = new ExportClass();
string wherestr = null;
if ((StartTBX.Text.Length > 0) && (EndTBX.Text.Length > 0)) { wherestr = String.Format("((STATUS = 'User' And PostStatus='Default') or STATUS = 'Admin') And (CreateDate >='{0}' And CreateDate <='{1}')", StartTBX.Text, EndTBX.Text); }
else if (StartTBX.Text.Length > 0) { wherestr = String.Format("((STATUS = 'User' And PostStatus='Default') or STATUS = 'Admin') And CreateDate >='{0}'", StartTBX.Text); }
else if (EndTBX.Text.Length > 0) { wherestr = String.Format("((STATUS = 'User' And PostStatus='Default') or STATUS = 'Admin') And CreateDate <='{0}'", EndTBX.Text); }
else { wherestr = "((STATUS = 'User' And PostStatus='Default') or STATUS = 'Admin')"; }
Exc.ExportToExcel("SELECT Users.UserID, UserName, Status, LockUser, FName + ' ' + Lname as [نام کامل] FROM Users inner join UsersInfo on Users.UserID=UsersInfo.UserID WHERE " + wherestr + " ORDER BY CreateDate DESC");
}
When I do not use date filtering in code(last else in code), every thing is fine but when i use date filtering, the content of [نام کامل] format is lost. content of [نام کامل] is Non-English words.
without date filter:
with date filter:
Please help me. Thank a lot.

Answer 1

well, my problem resolve with this code:
HttpContext.Current.Response.ContentEncoding = Encoding.Unicode;
HttpContext.Current.Response.BinaryWrite(Encoding.Unicode.GetPreamble());
best regards.