Question

我正在使用foreach循环生成content如何监听按钮单击以调用代码隐藏功能。我无法为ASP按钮设置值。我该怎么办呢？当用户点击按钮时，我希望他们点击的用户的ID传递给代码隐藏

Answer 1

您可以在按钮的CommandArgument属性中传递ID，并且可以在循环内部分配onclick事件：

//for loop
//...
Button btn = new Button();
//etc
btn.CommandArgument = theID;
btn.Click += new EventHandler(btn_Click);
//...
//end for loop

protected void btn_Click(object sender, EventArgs e)
{
    //Need to know which btn was clicked
    Button btn = sender as Button;
    if(btn == null)
    {
        //throw exception, etc
    }
    int id = Convert.ToInt32(btn.CommandArgument);
    //etc
}

Answer 2

您可以使用运行时生成的Button Id将值传递给它。

//Counter for Dynamic Buttons.
int DynamicButtonCount = 1;

//This event generates Dynamic Buttons.
private void btnGenerate_Click(object sender, EventArgs e)
{
    string name = "Dynamic Button_" + DynamicButtonCount;
    Button btnDynamicButton = new Button();
    btnDynamicButton.Name = name;
    btnDynamicButton.Text = name;
    btnDynamicButton.Id=  DynamicButtonCount; //Use this id value
    btnDynamicButton.Size = new System.Drawing.Size(200, 30);
    btnDynamicButton.Location = new System.Drawing.Point(40, DynamicButtonCount * 40);
    btnDynamicButton.Click += new EventHandler(this.btnDynamicButton_Click);
    Controls.Add(btnDynamicButton);
    DynamicButtonCount++;
}

//This event is triggered when a Dynamic Button is clicked.
protected void btnDynamicButton_Click(object sender, EventArgs e)
{
    Button dynamicButton = (sender as Button);
    MessageBox.Show("You clicked. " + dynamicButton.Name);
}

在ASP.NET中动态生成按钮并将值传递给Codebehind

2 个答案: