Question

Private Sub GetSelectedBasketRecord()
Dim j As Integer = 0

ViewState("SelectedBasket") = Nothing
For i As Integer = 0 To gvSapBaskets.Rows.Count - 1

    Dim rb As CheckBox = DirectCast(gvSapBaskets.Rows(i).Cells(0).FindControl("CHKButton1"), CheckBox)
    If rb IsNot Nothing Then
        If rb.Checked Then

            Dim hf As HiddenField = DirectCast(gvSapBaskets.Rows(i).Cells(0).FindControl("HiddenFieldBasketID"), HiddenField)
            If hf IsNot Nothing Then
                j = j + 1
                If j = 1 Then
                    ViewState("SelectedBasket") = "PositionID = " & hf.Value & " "
                Else
                    ViewState("SelectedBasket") = ViewState("SelectedBasket") & "AND PositionID = " & hf.Value & " "
                End If
                BasketIDLBL.Text = ViewState("SelectedBasket")
            End If

            If i = gvSapBaskets.Rows.Count - 1 Then
                Exit For
            End If
        End If
    End If

Next
End Sub

我在gridview中有复选框，

用户可以选择多个复选框
每个复选框都分配了一个ID

目前我打算做的是创建一个SQL查询，根据用户在gridview中选择的内容返回行，viewstate将生成SQL查询的一部分

如果用户选择1行：ViewState（＆＃34; SelectedBasket＆＃34;）为PositionID = 1234
如果选择2行ViewState（＆＃34; SelectedBasket＆＃34;）为PositionID = 1234 AND PositionID = 5678

然后我将生成像

这样的SQL

"SELECT * FROM TABLE WHERE " & ViewState("SelectedBasket") & "

ViewState（＆＃34; SelectedBasket＆＃34;）类似于PositionID = 1234 AND PositionID = 5678

我有一种感觉可能有更好的解决方法，只是想不到它

非常感谢任何帮助！

Answer 1

你可能是指OR而不是AND。

但更简单的方法是使用IN：

SELECT * FROM TABLE WHERE PositionID IN (1234, 5678)

Answer 2

我认为这可能就是你要找的东西：

Private Sub GetSelectedBasketRecord()
  ViewState("SelectedBasket") = ""
  For Each gvRow in gvSapBaskets.Rows
      Dim rb As CheckBox = DirectCast(gvRow.FindControl("CHKButton1"), CheckBox)
      If rb IsNot Nothing Then
          If rb.Checked Then
              Dim hf As HiddenField = DirectCast(gvRow.FindControl("HiddenFieldBasketID"), HiddenField)
              If hf IsNot Nothing Then
                  ViewState("SelectedBasket") &= ViewState("SelectedBasket") & ", "
              End If
          End If
      End If
  Next

  If ViewState("SelectedBasket") <> "" Then
     ViewState("SelectedBasket") = Left(ViewState("SelectedBasket"), LEN(ViewState("SelectedBasket"))-2)
     ViewState("SelectedBasket") = "In (" & ViewState("SelectedBasket") & ")"
  End If
End Sub

选择多个记录的最佳方法GridView Asp.Net

2 个答案: