vb.net 文本框中的值成员和组合框中的显示成员
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value member in textbox and display member in combobox
提问by Waleed Ehsan
i have a textbox and comboboxand a datatable (fill from database) datatablehas two columns one is idand other is namethe combobox is bind with this datatable like
我有一个文本框和组合框和DataTable（填充从数据库） 数据表有两列一个ID等是名称的组合框与此类似数据表绑定
Form1.ComboBox1.DataSource = dt
Form1.ComboBox1.DisplayMember = "name"
Form1.ComboBox1.ValueMember = "id"
if the user select a display member from comboBox1 dropdown the valuemember display in the textbox1 like
如果用户从 comboBox1 下拉列表中选择一个显示成员，则 valuemember 显示在 textbox1 中，例如
Private Sub ComboBox1_SelectedValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedValueChanged
If ComboBox1.SelectedIndex = -1 Then
Return
Else
TextBox1.Text = ComboBox1.SelectedValue.ToString
End If
and the other process is if the user enter the value in textbox1 and in the leave hanler of textbox1 what we write that when an ID enter in the textbox1 and leave control its automatically selected the corresponding display member in ComboBox1. if not exist then clear the textbox1
另一个过程是如果用户在 textbox1 和 textbox1 的离开处理程序中输入值，我们写什么，当一个 ID 进入 textbox1 并离开控件时，它会自动选择 ComboBox1 中相应的显示成员。如果不存在则清除 textbox1
Private Sub TextBox1_Leave(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.Leave
Dim dv As DataView
if ( dv = dv.RowFilter = "id =" & TextBox1.Text.ToString) then
//select the value memeber if record find
//ComboBox1.text = finded diaplay member
else
textbox1.text = string.empty
ComboBox1.selectindex = -1
end if
End Sub
采纳答案by ajakblackgoat
Inside your TextBox1_Leave handler just need to have the following:
在您的 TextBox1_Leave 处理程序中，只需要具有以下内容：
Private Sub TextBox1_Leave(sender As Object, e As EventArgs) Handles TextBox1.Leave
Dim value As String = TextBox1.Text
ComboBox1.SelectedValue = value
End Sub
回答by andmat
try this:
尝试这个：
ComboBox1.SelectedIndex = ComboBox1.FindString(TextBox1.Text)
I'm working with C# on a daily basis but I think this VB syntax should be right
我每天都在使用 C#，但我认为这个 VB 语法应该是正确的
