從vb中的Datagridview提取數據

Question

我有我的datagridview，我想將該信息傳遞到數據表或其他地方，我正在嘗試

 Dim dt As DataTable
    dt = CType(DataGridView1.DataSource, DataTable)

但是我只會得到空值，有什么想法嗎？ 我不知道如何從datagridview獲取信息

Answer 1

你可以試試看 dt = TryCast(DataGridView1.DataSource, DataTable)或

Dim dt As New DataTable
dt = (DirectCast(DataGridView1.DataSource, DataTable))

要么

使用以下函數從網格獲取數據表

public DataTable DataGridView2DataTable(DataGridView dgv, String tblName, int minRow=0){

  DataTable dt = new DataTable(tblName);

  // Header columns
  foreach (DataGridViewColumn column in dgv.Columns)
  {
    DataColumn dc = new DataColumn(column.Name.ToString());
    dt.Columns.Add(dc);
  }

  // Data cells
  for (int i = 0; i < dgv.Rows.Count; i++)
  {
    DataGridViewRow row = dgv.Rows[i];
    DataRow dr = dt.NewRow();
    for (int j = 0; j < dgv.Columns.Count; j++)
    {
      dr[j] = (row.Cells[j].Value == null) ? "" : row.Cells[j].Value.ToString();
    }
    dt.Rows.Add(dr);
  }

  // Related to the bug arround min size when using ExcelLibrary for export
  for (int i = dgv.Rows.Count; i < minRow; i++)
  {
    DataRow dr = dt.NewRow();
    for (int j = 0; j < dt.Columns.Count; j++)
    {
      dr[j] = "  ";
    }
    dt.Rows.Add(dr);
  }
  return dt;
}

Answer 2

我有一個解決方案，有點臟，但是...對我有用

  Dim valor As Integer
    valor = DataGridView1.RowCount
    valor = valor - 2

    For indice As Integer = 0 To valor
        ' DataGridView1.Item(0, indice).Value.ToString()
        ' DataGridView1.Item(1, indice).Value.ToString()
        ' in my case i only have two colums but if tyou have more you can use double for
    Next

希望這對某人有幫助:)