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Sub addcomboxitem()

      Dim Sql_connect As String
      Dim Rst As New ADODB.Recordset
      Dim s As String
      Sql_connect = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\TEST.mdb;Persist Security Info=False"
      Rst.Open "select ¹ú±êÂë from WJSZ , Sql_connect, adOpenForwardOnly, adLockReadOnly"
      On Error Resume Next

          While Not Rst.EOF
            k = k + 1
            s = s + Rst.Fields("¹ú±êÂë").value
            Rst.MoveNext
        Wend
        Rst.Close '¶ÁÍêÊý¾Ýºó¹Ø±Õ¼Ç¼¼¯
msgbox s
End Sub

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        Dim searchKW As String = txtbxSearch.Text
        Dim cmdSearch = New OleDb.OleDbCommand
        cmdSearch.CommandText = " ......

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C# code:

public override int Update(Table model, DbTransaction dbtran)
{
StringBuilder strSql = new StringBuilder();
strSql.Append("update Tabl ......
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