export datagrid's data to excel

代码

protected void export_Click(object sender, EventArgs e)
{
BusinessLayer bl = new BusinessLayer();
DataTable dt = bl.GetAllUnpaidOrders().Tables[0];
byte[] dataBuffer = GetTimesheetReporteStream(dt);
string fileName = "TimesheetDefaulterReport.csv";
this.Response.Clear();
this.Response.Charset = "GB2312";
this.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
this.Response.ContentType = "application/vnd.ms-excel"; // "application/octet-stream"; //"application/ms-excel"; //vnd.
this.Response.AppendHeader("content-disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8).Replace("+", "%20"));
this.Response.OutputStream.Write(dataBuffer, 0, dataBuffer.Length);
this.Response.Flush();
this.Response.End();
}
public byte[] GetTimesheetReporteStream(DataTable dt)
{
StringBuilder builder = new StringBuilder();
foreach (DataColumn column in dt.Columns)
{
builder.Append(column.ColumnName + ",");
}
builder.Append(Environment.NewLine);
foreach (DataRow row in dt.Rows)
{
for (int i = 0; i < dt.Columns.Count; i++)
{
builder.Append(ConvertToCsvCell(row[i].ToString()) + ",");
}
builder.Append(Environment.NewLine);
}
byte[] dataBuffer = Encoding.Default.GetBytes(builder.ToString());
return dataBuffer;
}
public static string ConvertToCsvCell(string cell)
{
cell = SBCToDBC(cell);
if (cell.Contains(@",") || cell.Contains("\""))
{
cell = cell.Replace("\"", "\"\"");
cell = "\"" + cell + "\"";
}
else
{
if (cell.Contains("\r") || cell.Contains("\n"))
{
cell = "\"" + cell + "\"";
}
}
return cell;
}
public static string SBCToDBC(string input)
{
char[] cc = input.ToCharArray();
for (int i = 0; i < cc.Length; i++)
{
if (cc[i] == 8220 || cc[i] == 8221)
{
cc[i] = (char)34;
continue;
}
if (cc[i] == 8216 || cc[i] == 8217)
{
cc[i] = (char)39;
continue;
}
if (cc[i] == 12288)
{
cc[i] = (char)32;
continue;
}
if (cc[i] > 65280 && cc[i] < 65375)
{
cc[i] = (char)(cc[i] - 65248);
}

}
return new string(cc);
}