DataGridView增加欄位

DataGridViewTextBoxColumn col5 = new DataGridViewTextBoxColumn();
dataGridView1.Columns.Add(col5);
dataGridView1.Columns[5].Name = "Column5";
DataGridViewTextBoxColumn col6 = new DataGridViewTextBoxColumn();
dataGridView1.Columns.Add(col6);
dataGridView1.Columns[6].Name = "Column6";

計算目錄大小及檔案數量

1.使用.Net Framework 4.5
2.using System.IO
3.計算目錄大小：
static long CalculateDirectorySize(DirectoryInfo directory, bool includeSubdirectories)
{
    long totalSize = directory.EnumerateFiles().Sum(file => file.Length);
    if (includeSubdirectories)
    {
         totalSize += directory.EnumerateDirectories().Sum(dir => CalculateDirectorySize(dir, true));
     }
     return totalSize
}
4.計算被指定目錄的檔案數量(含子目錄)
static string CalculateDirectoryFiles(string directory)
{
    string fileCount = null;

    DirectoryInfo dir = new DirectoryInfo(directory);
    int files = dir.EnumerateFiles("*.*", SearchOption.AllDirectories).Count();
    fileCount = files.ToString("#,0");
     return fileCount;
    }

用foreach逐行讀取DataGridView資料

foreach (DataGridViewRow row in dataGridView1.Rows)
{
     string Column1 = row.Cells[0].Value.ToString();
     string Column2 = row.Cells[1].Value.ToString();
}