在Windows应用程序中使用两个组合框 [英] using two combo box in windows application

问题描述

有两个组合框state和district，这些值是从数据库绑定的.当我根据所选项目区域选择状态时，必须显示

there are two combo boxs state and district, the values are bind from database. when i select state based upon selected item district has to display

推荐答案

请参考:这与源代码完全相同.

创建级联DropDownLists [ C#-级联组合框会在Windows中出现 [ ^ ]
层叠组合框会生成Windows [如何做Windows应用程序中的级联组合框 [

Please refer: This is exact one with source code.

Creating Cascading DropDownLists[^]
This article explains you how to create a Cascading DropDownLists in ASP.Net that is DropDownLists which depend on the previous or parent DropDownList for the data.

C# - Cascading combo box results in a Windows[^]
Cascading combo box results in a Windows[^]
Similar discussion: How to do cascading combobox in windows application[^]

我认为，以下帖子可以为您提供帮助:
http://stackoverflow.com/questions/10239392/c-sharp- combobox-options-dependent-on-another-combobox [ ^ ]
http://stackoverflow.com/questions/4635217/one-combobox- [-a-other-combobox-in-wpf [ ^ ]

I think, the following posts can help you:
http://stackoverflow.com/questions/10239392/c-sharp-combobox-options-dependent-on-another-combobox[^]
http://stackoverflow.com/questions/4635217/one-combobox-dependent-on-other-combobox-in-wpf[^]

像这样尝试

try like this

Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
      If ComboBox1.SelectedItem.ToString() = "AP" Then
          ComboBox2.Items.Add("Medak")
 ComboBox2.Items.Add("Hyd")
'or bind combobox from db  also bind combobox2 here like  
 Dim cmd As SqlCommand = New SqlCommand()
        cmd.Connection = con
        cmd.CommandText = "select dist from district  where state='"+combobox1.selecteditem.tostring()+"'"
        con.Open()
        dr = cmd.ExecuteReader()
        If (dr.HasRows = True) Then
            While (dr.Read())
               ComboBox2.Items.Add(dr("dist").ToString())

            End While
        End If
        dr.Close()
        con.Close()
      End If

  End Sub

这篇关于在Windows应用程序中使用两个组合框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！