dataGridView 导出数据--CSV导出

/// <summary>
/// 导出报表为Csv
/// </summary>
/// <param name="dt">DataTable</param>
/// <param name="tableName">表名</param>
/// <param name="tableheader">表头</param>
/// <param name="columname">字段标题,逗号分隔</param>

public static bool DataTableToCSV(DataTable dt, string tableName, string tableheader, string columname)
{
    if (!Directory.Exists("D:" + "\\" + "数据报表"))
    {
        Directory.CreateDirectory("D:" + "\\" + "数据报表");
    }
    if (!Directory.Exists("D:" + "\\" + "数据报表" + "\\" + "测试记录"))
    {
        Directory.CreateDirectory("D:" + "\\" + "数据报表" + "\\" + "测试记录");
    }
    string strFilePath = @"D:/数据报表/测试记录/" + tableName + ".csv";
    try
    {
        string strBufferLine = "";
        StreamWriter strmWriterObj = new StreamWriter(strFilePath, false, System.Text.Encoding.UTF8);
        //strmWriterObj.WriteLine(tableheader);
        strmWriterObj.WriteLine(columname);
        for (int i = 0; i < dt.Rows.Count; i++)
        {
            strBufferLine = "";
            for (int j = 0; j < dt.Columns.Count; j++)
            {
                if (j > 0)
                    strBufferLine += ",";
                strBufferLine += dt.Rows[i][j].ToString();
            }
            strmWriterObj.WriteLine(strBufferLine);
        }
        strmWriterObj.Close();
        return true;
    }
    catch
    {
        return false;
    }
}