asp.net-mvc - 如何使用asp.net自动调整csv文件中的列

Question

我需要将数据表中的值导出为 csv 格式。我的代码工作正常，但由于列值很大，它归结为下一行。因此完全对齐正在改变。下面是我的代码。请帮忙。

        System.Data.DataTable dtMainSQLData = new System.Data.DataTable();

        da.Fill(dtMainSQLData);

        // Create the CSV file to which grid data will be exported.
        string filename = "Report";
        string test_Filepath = "C:\\Desktop\\";
        string file1 = filename + "_" + String.Format("{0:dd}", DateTime.Today) + String.Format("{0:MMMM}", DateTime.Today) + String.Format("{0:yyyy}", DateTime.Today) + ".csv";
        string new1 = test_Filepath + file1;
        FileInfo file = new FileInfo(new1);
        if (file.Exists == true)
            file.Delete();

    StreamWriter sw = new StreamWriter(new1, false);

    //First we will write the headers.

    int iColCount = dtMainSQLData.Columns.Count;

    for (int i = 0; i < iColCount; i++)
    {
        sw.Write(dtMainSQLData.Columns[i]);
        if (i < iColCount - 1)
        {
            sw.Write(",");
        }
    }
    sw.Write(sw.NewLine);


    // Now write all the rows.

    foreach (DataRow dr in dtMainSQLData.Rows)
    {
        for (int i = 0; i < iColCount; i++)
        {
            if (!Convert.IsDBNull(dr[i]))
            {
                sw.Write(dr[i].ToString());
            }
            if (i < iColCount - 1)

            {
                sw.Write(",");
            }
        }
        sw.Write(sw.NewLine);
    }
    sw.Close();
    Environment.Exit(0);
}