Button_Click method is not working

Question

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when i run the following code i get the error like

The event 'System.Web.UI.WebControls.Button.Click' can only appear on the left hand side of += or -=	C:\Documents and Settings\cmsdev3\My Documents\Visual Studio 2005\Projects\CreatingCheckBoxList\CreatingCheckBoxList\CheckBoXList.aspx.cs	40	25	CreatingCheckBoxList

C#

public bool isCheckboxSelected()
{
    for (int i = 0; i < CheckBoxList1.Items.Count; i++)
    {
        if (!CheckBoxList1.Items[i].Selected)
        {
            return false;
        }
    }
    return true;
}

protected void Button1_Click(object sender, EventArgs e)
{
    if (Button1.Click)
    {
        if (isCheckboxSelected())
        {
            string.Format(" completion is successful");
        }
        else
        {
            string.Format(" completion is not successful please select each check box");
        }
    }
}

Posted 16-Aug-11 4:15am

pratheep7

Updated 16-Aug-11 4:21am

#realJSOP

v2

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#realJSOP · Answer 1 · 2011-08-16T04:23:00

Solution 1

That's because you're trying to use an event in some bizarre way (I have no idea what you're expecting to happen).

Remove the line if (Button1.Click), and see if that doens't work better for you.

Posted 16-Aug-11 4:23am

#realJSOP

sudeshchandram · Answer 2 · 2011-08-16T04:24:00

Solution 2

it is because of your first if statement under button click,

if (Button1.Click)
{
}

remove that 'if' condition. It should work.

Posted 16-Aug-11 4:24am

sudeshchandram

Harmanjeet Singh · Answer 3 · 2011-08-16T04:48:00

why are you setting it like if(Button1.Click)

If you want to perform any action, just do it like this..

C#

protected void Button1_Click(object sender, EventArgs e)
{
    //if (Button1.Click)
    //{
        if (isCheckboxSelected())
        {
            string.Format(" completion is successful");
        }
        else
        {
            string.Format(" completion is not successful please select each check box");
        }
    //}
}

Button1_Click itself means that you are telling it to do something on the button click event. So no need to add something like Button1.Click

NOTE:
u can use this Button1.Click in those cases when you want the same work to do on the action of some other event, like

protected void Button2_Focus(object sender, EventArgs e)
{
Button1.Click();
}

Now the focus on button2 make it call to the button1 click event routine..

Oludayo Alli · Answer 4 · 2011-08-16T04:58:00

Solution 4

Button.Click means you want to create EventHandler for your button click event. Button.Click is not a conditional statement nor an expression so it will not work with the 'if'. I believe you've gone pass this problem, I just want to add reason(s) why your code did not work

Posted 16-Aug-11 4:58am

Oludayo Alli