Question

我有一个代码，用于将数据从SQL Server检索到CheckedListBox

    Dim queryString As String = "SELECT Facility FROM Database.dbo.Facility"
    Dim connection As New SqlConnection(connectionString)
    Dim command As New SqlCommand(queryString, connection)
    connection.Open()
    Dim dataReader As SqlDataReader = command.ExecuteReader()
    Dim var As New DataTable
    Dim source As New BindingSource
    source.DataSource = dataReader
    CheckList_Facility.DataSource = source
    CheckList_Facility.ValueMember = "Facility"
    connection.Close()

结果很好，假设我有结果：

[ ]AA
[ ]BB
[ ]CC

我想检查如果有“BB”，那么它会自动检查“BB”以便

[ ]AA
[X]BB
[ ]CC

我试过但失败了。有点像

     For Each item In CheckedList_Facility.Items
        If (item("Facility").ToString() = "BBB") Then
            CheckedList_Region.SelectedValue = True
    Next

要尝试它确实实际返回字符串，我测试了代码

For Each item In CheckedList_Facility.Items
    MsgBox(item("Facility").ToString())
Next

确实返回“AA”，“BB”，“CC”

Answer 1

尝试以下代码

Dim queryString As String = "SELECT Facility FROM Database.dbo.Facility"
Dim checkedValue As String = "BB"
Dim connection As New SqlConnection(connectionString)
Dim command As New SqlCommand(queryString, connection)

connection.Open()

Dim dataReader As SqlDataReader = command.ExecuteReader()

If dataReader.HasRows Then
    Do While dataReader.Read
        Dim facility As String = dataReader.Item("Facility").ToString()
        Dim checkedState As Boolean = facility = checkedValue

        CheckList_Facility.Items.Add(facility, checkedState)
    Loop
End If

connection.Close()

在CheckedLIstBox VB.Net中设置默认检查项

1 个答案: