how to now what button was pressed before!

aleksandar ruba

I am a beginner and would like some help.
I have 3 button and the action on the 4th depends who had been pressed before.
try to give me some suggestion
thanks in advance!!!

button4 on-click
if(button1 was pressed before)
{
do something
}
else if(button2 pressed before)
{
do something
}....

7 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes14y ago
Accepted answer
The code I posted is for a Windows Forms application.

If it's an ASP.NET application (as suggested by mention of Page_Load), then you'll have to do it differently.

This should work:

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Session["pressed1"] = false;
Session["pressed2"] = false;
Session["pressed3"] = false;
}
}

protected void Button1_Click(object sender, EventArgs e)
{
Session["pressed1"] = true;
Session["pressed2"] = false;
Session["pressed3"] = false;
}

// similar code for other buttons

protected void Button4_Click(object sender, EventArgs e)
{
bool pressed1 = (bool)Session["pressed1"];
bool pressed2 = (bool)Session["pressed2"];
bool pressed3 = (bool)Session["pressed3"];

if (pressed1)
{
// do something;
}
else if (pressed2)
{
// do something
}
else if (pressed3)
{
// do something
}
else // no button was previously pressed
{
// do something else
}
}
aleksandar ruba14y ago
thx guys,this works for me,and I I am grateful to you for advice and I understood what mr. Sam wanted to tell .I be careful next time.
Sam Hobbs14y ago
If the action of the fourth button depends on which button was pressed previously and only which one was the last to be pressed then you can use radio buttons for the first three buttons. That would make it easier for you and it will make it easier for your user since radio buttons work the way you would be using them and the user would expect them to.

Also note that when asking questions it helps to make it clear that it is an ASP application. The best way to do that is to put the question in the C# Corner ASP .Net forum but if you were to state explicitly in your question that it is ASP then that will make it easier for everyone.
Vulpes14y ago
A slightly easier way to do it would to use a single int variable rather than 3 bools:

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Session["lastPressed"] = 0;
}
}

protected void Button1_Click(object sender, EventArgs e)
{
Session["lastPressed"] = 1;
}

protected void Button2_Click(object sender, EventArgs e)
{
Session["lastPressed"] = 2;
}

protected void Button3_Click(object sender, EventArgs e)
{
Session["lastPressed"] = 3;
}

protected void Button4_Click(object sender, EventArgs e)
{
int lastPressed = (int)Session["lastPressed"];

switch(lastPressed)
{
case 1:
// do something
break;

case 2:
// do something
break;

case 3:
// do something
break;

default:
// do something else
break;
}
}
aleksandar ruba14y ago
soory but this dont work
i put in web form and is very logic this but dont work.
if you have other sugestion i will be happy and thx for your engagement
aleksandar ruba14y ago
thx ,it will be good i guess
if i understand this private bool pressed1 = false; I put in page load?
Vulpes14y ago
Just define three private bool fields in your form:

private bool pressed1 = false;
private bool pressed2 = false;
private bool pressed3 = false;

Suppose now that button1 is pressed. Then set those fields as follows:

private void button1_Click(object sender, EvenArgs e)
{
pressed1 = true;
pressed2 = false;
pressed3 = false;
}

and so on for the other buttons.

When button4 is pressed, you can now do:

if(pressed1)
{
// do something
}
else if(pressed2)
{
// do something
}
else // pressed3 must be true
{
// do something
}