Asp.net動態控件下拉列表和文本框問題

Question

我 在asp.net中創建了2個下拉列表和2個文本框.i在運行時禁用文本框。我希望當我從下拉文本框中選擇項目時應該使如何執行此任務，請幫助我:(

Answer 1

上的SelectedIndexChanged的下拉列表調用設置啓用=真文本框的功能。要訪問已動態添加，你可以使用的FindControl按控制C#, FindControl

Answer 2

我覺得像這樣應該可以幫到你：

在你的頁面的的OnInit事件：

DropDownList ddl = new DropDownList(); 
ddl.SelectedIndexChanged += new EventHandler(ddl_SelectedIndexChanged); 
placeholder.Controls.Add(ddl); //assuming this is what you use to dynamically show the dropdown list 

TextBox yourTextbox = new TextBox(); //declare the variable outside to be able to be accessed by other methods, but it must be instantiated here. declaration here is for illustration purposes only 
yourTextBox.Enabled = false; 
placeholder.Controls.Add(yourTextBox); 

裏面的實例化的事件處理程序：

void ddl_SelectedIndexChanged(object sender, EventArgs e) 
{ 
    yourTextbox.Enabled = true; 
}