我是VB的新手。我有一个政策号。 VB中的组合框,在我输入策略号的前四位后填充。但是,如果我继续输入数字,它会覆盖我已输入的内容并清除下拉列表,就像选择我输入的新4个数字一样。我想实现一个场景,我将输入前4个数字以填充下拉列表,因为我继续进入policyno下拉列表中的值被搜索。
EG:政策号码:969003648,当我输入9690时,下拉列表中填写了从969000001开始的策略号,现在当我继续输入值为969003等时,搜索到的值被限制为策略号没有969003作为起始值...请协助
我的代码:
Private Sub PolicyNo_KeyDown(KeyCode As Integer, Shift As Integer)
If KeyCode = 46 Or KeyCode = 8 Then
Me.PolicyNo.value = ""
Else
If Len(Me.PolicyNo.Text) >= 4 Then
Me.PolicyNo.RowSource = ""
Call ReloadPolicyNo(Nz(Me.PolicyNo.Text, ""))
Function ReloadPolicyNo(sPolicyNo As String)
Me.PolicyNo.RowSource = "SELECT Inventory.PolicyNo FROM Inventory " & _
"WHERE Left(Inventory.PolicyNo," & Len(Me.PolicyNo.Text) & ") = '" & Me.PolicyNo.Text & "' order by Inventory.PolicyNo"
End Function
答案 0 :(得分:0)
为什么不在组合框中使用Textchanged事件来获取当前组合框中的内容?
示例
'THIS FIRES WHEN TEXT IS ENTERED INTO THE COMBOBOX
Private Sub ComboBox1_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.TextChanged
'GET VALUE IN COMBOBOX
Dim enteredText As String = ComboBox1.Text
Dim strSelect As String = "select * from table where field like = '" & enteredText & "'%"
'load COMBO BOX HERE
End Sub
答案 1 :(得分:0)
最好在这里使用DataView
,我将DataTable
声明为class Variable
。
Dim dt as DataTable
从数据库获取所有数据并将其绑定到声明的DataTable
,此DataTable
进一步添加到DataView
并使用RowFilter
过滤DataView
。
Compay_Type
是我DataTable
中的列之一。下面的代码将过滤DataView
并将数据绑定到列Company_Type=1
Dim dvComp As New DataView(dt)
dvComp.RowFilter = "Company_Type=1"
ComboBox1.DisplayMember = "CompanyName"
ComboBox1.ValueMember = "CompanyID"
ComboBox1.DataSource = dvComp
要删除过滤器,请使用dvComp.RowFilter = Nothing