datatable to Excel in c#

Question

While exporting Datatable to Excel some columns to fall into a new line. I don't know what the problem is. My code is below:

string attachment = "attachment; filename=Test.xls";
Response.ClearContent();
Response.AddHeader("content-disposition", attachment);
Response.ContentType = "application/vnd.ms-excel";
string tab = "";
foreach (DataColumn dc in transposedTable.Columns)
{
    Response.Write(tab + dc.ColumnName);
    //tab = "\t";
}
Response.Write("\t");
int i;
foreach (DataRow dr in transposedTable.Rows)
{
    Response.Write("\n");
    tab = "";
    for (i = 0; i < transposedTable.Columns.Count; i++)
    {
        Response.Write(tab + dr[i].ToString());
        tab = "\t";
    }
    Response.Write("\t");
}
Response.End();

I have tried many ways, but didn't get the exact issue. Is the issue with excel in machine or with my code?

Answer 1

It seems possible that your DataRow data contains newline characters, that is one reason why newlines might be appearing in your data.

Swapping:

    Response.Write(tab + dr[i].ToString());

For:

    string replacement = Regex.Replace(dr[i].ToString(), @"\t|\n|\r", "");
    Response.Write(tab + replacement);

May fix the problem if I did diagnose it correctly.