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convert datatable to csv file in asp.net


Code : Use Following function and modify as you need
    protected void UploadDataTableToExcel(DataTable dtEmp, string filename, string uniquenumber,string depositdate)
    {


        string attachment = "attachment; filename=" + filename;
        Response.ClearContent();
        Response.AddHeader("content-disposition", attachment);
        Response.ContentType = "application/vnd.ms-excel";
        string tab = string.Empty;

        Response.Write(tab + "\" Client Name :  \",\" ng \",\" \",\"   Number : " + .ToString() + "  \",\" \",\" ReRegistration \" \r\n");
        Response.Write(tab + "\"Client Code:\",\" LVFOPNDRR \",\" \",\" Deposit Date : \",\" "+depositdate+"\",\" \"  \r\n");
        tab = "\"";
        foreach (DataColumn dtcol in dtEmp.Columns)
        {
            Response.Write(tab + dtcol.ColumnName);
            tab = "\",\"";
        }
        Response.Write("\"\r\n");
        foreach (DataRow dr in dtEmp.Rows)
        {
            tab = "\"";
            for (int j = 0; j < dtEmp.Columns.Count; j++)
            {
                Response.Write(tab + Convert.ToString(dr[j]));
                tab = "\",\"";
            }
            Response.Write("\"\r\n");
        }
        Response.End();
    }

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