當在組合框中

Question

我有5個不同的選項組合框中選擇的項目如何顯示隱藏的文本框，「一名球員」，「兩名球員」，「三名球員」等我的要求是，當用戶選擇的東西從組合框中可以看到等價的文本框，即如果選擇了「單個玩家」，則應出現一個文本框，以便用戶輸入該值。兩個和三個一樣。請建議。

Answer 1

只需使用CSS的可視性相結合jQuery中（https://api.jquery.com/change/）提供的.change（）函數（visibility：hidden的/可見;檢查http://www.w3schools.com/cssref/pr_class_visibility.asp）

$("#myComboBox").change(function() { 
    //do what you have to do here 
}); 

Answer 2

Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged 
    If ComboBox1.Text.Trim.Contains("Player 1") = True Then 
     TextBox1.Visible = True 
     TextBox2.Visible = False 
     TextBox3.Visible = False 
    ElseIf ComboBox1.Text.Trim.Contains("Player 2") = True Then 
     TextBox1.Visible = True 
     TextBox2.Visible = True 
     TextBox3.Visible = False 
    ElseIf ComboBox1.Text.Trim.Contains("Player 3") = True Then 
     TextBox1.Visible = True 
     TextBox2.Visible = True 
     TextBox3.Visible = True 
    End If 
End Sub 

Answer 3

嘗試是這樣的：

Sub cbC(sender As Object, e As EventArgs) Handles ComboBox1.SelectedIndexChanged 
    Select Case ComboBox1.SelectedIndex 
     Case 0 
      TextBox1.Visible = False 
      TextBox2.Visible = False 
     Case 1 
      TextBox1.Visible = True 
      TextBox2.Visible = False 
     Case 2 
      TextBox1.Visible = True 
      TextBox2.Visible = True 
    End Select 
End Sub 

或者，根據什麼更好的適合你的需求：

Sub cbC(sender As Object, e As EventArgs) Handles ComboBox1.SelectedIndexChanged 
    TextBox1.Visible = (ComboBox1.SelectedIndex = 0) 
    TextBox1.Visible = (ComboBox1.SelectedIndex = 1) 
End Sub 

Answer 4

的TextBox1.Visible = (ComboBox1.SelectedIndex = 0)完美。

您還必須確保屬性下設置可見爲False您的文本框和標籤。否則，當您運行應用程序時，您的文本框將最初可見。