我从上一篇文章中得到了这段代码,关于基于按钮的单击事件动态制作面板。出于某种原因,它给了我两个文本框,我在破译代码时遇到了问题。自从我处理这种 C# 以来已经有一段时间了。这可能是一个简单的修复,但是就像我说的那样,已经有一段时间了。ASP.net 代码只是一个按钮,因此无需粘贴。
C#:
public partial class Testing : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
// Add any controls that have been previously added dynamically
for (int i = 0; i < TotalNumberAdded; ++i)
{
AddControls(i + 1);
}
// Attach the event handler to the button
Button1.Click += new EventHandler(Button1_Click);
}
protected void Button1_Click(object sender, EventArgs e)
{
// Increase the number added and add the new label and textbox
TotalNumberAdded++;
AddControls(TotalNumberAdded);
}
private void AddControls(int controlNumber)
{
var newPanel = new Panel();
var newLabel = new Label();
var newTextbox = new TextBox();
// textbox needs a unique id to maintain state information
newTextbox.ID = "TextBox_" + controlNumber;
newLabel.Text = "Nature Of Accident";
// add the label and textbox to the panel, then add the panel to the form
newPanel.Controls.Add(newLabel);
newPanel.Controls.Add(newTextbox);
form1.Controls.Add(newPanel);
}
protected int TotalNumberAdded
{
get { return (int)(ViewState["TotalNumberAdded"] ?? 0); }
set { ViewState["TotalNumberAdded"] = value; }
}
}