[英]CheckedChanged event is not fired
In my WebForm
I want the total price changed when the user check one product but I have this problem with my code , 在我的
WebForm
我希望在用户检查一个产品时总价格发生变化,但我的代码存在此问题,
the CheckedChanged
event is not firing when I check the CheckBox
检查
CheckBox
时, CheckedChanged
事件没有触发
It is firing only when I click the Button
(used for as clear button) , and I didn't include that code within the button event ! 它只在我单击
Button
(用作清除按钮)时触发,并且我没有在按钮事件中包含该代码!
Here is my code: 这是我的代码:
public partial class _Default : System.Web.UI.Page
{
int total = 0;
String strtotal;
protected void ckb1_CheckedChanged(object sender, EventArgs e)
{
if (ckb1.Checked)
{
total = total + 100;
strtotal = total.ToString();
lbl2.Text = strtotal;
}
}
protected void ckb2_CheckedChanged(object sender, EventArgs e)
{
if (ckb2.Checked)
{
total = total + 80;
strtotal = total.ToString();
lbl2.Text = strtotal;
}
}
protected void ckb3_CheckedChanged(object sender, EventArgs e)
{
if (ckb3.Checked)
{
total = total + 70;
strtotal = total.ToString();
lbl2.Text = strtotal;
}
}
protected void Button3_Click(object sender, EventArgs e)
{
TextBox1.Text = " ";
ckb1.Checked = false;
ckb2.Checked = false;
ckb3.Checked = false;
}
}
All ASP.NET Server controls except Button
, Hyperlink
and LinkButton
have a default AutoPostBack
property of false
, So you should set AutoPostBack="true"
in your CheckBox
: 除了所有的ASP.NET服务器控件
Button
, Hyperlink
和LinkButton
有一个默认AutoPostBack
的属性false
,所以,你应该设置AutoPostBack="true"
在你的CheckBox
:
<asp:CheckBox ID="ckb1" runat="server" AutoPostBack="true" OnCheckedChanged="ckb1_CheckedChanged" />
It is firing only when I click the button
只有在我点击按钮时才会触发
As I said this is because the Button
have AutoPostBack
property of true
by default so after you checked the CheckBox
and then click the button the CheckBox
state automatically posts back to the server. 正如我所说,这是因为默认情况下
Button
AutoPostBack
属性为true
,因此在您选中CheckBox
然后单击按钮后, CheckBox
状态会自动回发到服务器。
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