vb.NET中文本框文本与列表框项文本的比较

如何在vb.NET中比较文本框文本和列表框项目文本…请提供帮助

Dim text As String = Me.TxtName.Text
For Each item As Object In Me.ListBox1.Items
    If item.ToString = text Then
        'Do something'
    Else
        'Do something else'
    End If
Next

</div>
<asp:ListBox ID="ListBox1" runat="server">
    <asp:ListItem>zero</asp:ListItem>
    <asp:ListItem>first</asp:ListItem>
    <asp:ListItem>second</asp:ListItem>
</asp:ListBox>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" />
</form>

如果使用自定义对象作为Listbox的数据源，请在类中重写以将它们与Textbox的文本进行比较。

</div>
<asp:ListBox ID="ListBox1" runat="server">
    <asp:ListItem>zero</asp:ListItem>
    <asp:ListItem>first</asp:ListItem>
    <asp:ListItem>second</asp:ListItem>
</asp:ListBox>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" />
</form>

例如：

Class FooClass
    Private _name As String

    Public Property Name() As String
        Get
            Return _name
        End Get
        Set(ByVal value As String)
            _name = value
        End Set
    End Property
    Public Overrides Function ToString() As String
        Return Me.Name
    End Function
End Class

</div>
<asp:ListBox ID="ListBox1" runat="server">
    <asp:ListItem>zero</asp:ListItem>
    <asp:ListItem>first</asp:ListItem>
    <asp:ListItem>second</asp:ListItem>
</asp:ListBox>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" />
</form>

---

我在VB.net中尝试了以下内容 它工作得很好

</div>
<asp:ListBox ID="ListBox1" runat="server">
    <asp:ListItem>zero</asp:ListItem>
    <asp:ListItem>first</asp:ListItem>
    <asp:ListItem>second</asp:ListItem>
</asp:ListBox>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" />
</form>

aspx页面

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

</div>
<asp:ListBox ID="ListBox1" runat="server">
    <asp:ListItem>zero</asp:ListItem>
    <asp:ListItem>first</asp:ListItem>
    <asp:ListItem>second</asp:ListItem>
</asp:ListBox>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" />
</form>

---

结束课程

到目前为止，您尝试了哪些不起作用的内容，您想了解哪些内容？我将完整的asp.net页面代码和代码放在下面，它运行良好，希望这对您有所帮助

</div>
<asp:ListBox ID="ListBox1" runat="server">
    <asp:ListItem>zero</asp:ListItem>
    <asp:ListItem>first</asp:ListItem>
    <asp:ListItem>second</asp:ListItem>
</asp:ListBox>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" />
</form>

Dim tempInt = lbTeams.Items.Count - 1
While (tempInt > -1)
    If (lbTeams.GetItemText(lbTeams.Items.Item(tempInt)).ToString().Equals(txtTeamName.Text) = True) Then
       MsgBox("Team Already Exist")
       Exit Sub
   End If
   tempInt -= 1
End While