Hi there are 2 times two textbox for entering two numbers and two times a button to make the sum of them. When i click on the second button for making the sum of the 3th and 4th textbox, the sum of the first and second textbox disappears. How can i keep the first sum visible while i click on the second button? I tried with EnableViewState="true" but no succes. Thanks. V My code: protected void Button1_Click(object sender, EventArgs e) { if (int.TryParse(TextBox1.Text, out g1) && int.TryParse(TextBox2.Text, out g2)) { int sum = g1 + g2; Label4.Text = sum.ToString(); } protected void Button2_Click(object sender, EventArgs e) { if (int.TryParse(TextBox3.Text, out g1) && int.TryParse(TextBox4.Text, out g2)) { int sum = g1 + g2; Label7.Text = sum.ToString(); } } }

I don’t see enableviewstate in your code. Set for label and textbox

protected void Button1_Click(object sender, EventArgs e) { if ( int .TryParse(TextBox1.Text, out g1) && int .TryParse(TextBox2.Text, out g2)) { int sum = g1 + g2; Label4.Text = sum.ToString(); session[sum1]= sum.ToString(); } protected void Button2_Click(object sender, EventArgs e) { if ( int .TryParse(TextBox3.Text, out g1) && int .TryParse(TextBox4.Text, out g2)) { int sum = g1 + g2; Label7.Text = sum.ToString(); Label4.Text = session[sum1].ToString(); } } }

Try enabling viewstate at page level. Else use session as mentioned above

I did but still same problem. The value of the textbox remains visible (with or without ebanbelviewstate). Only the value of the label which contains the sum disappears when clicking on the second button.

Answers

how to keep value when clicking on button in a form?

Valerie Meunier

903

there are 2 times two textbox for entering two numbers and two times a button to make the sum of them.

When i click on the second button for making the sum of the 3th and 4th textbox, the sum of the first and second textbox disappears.

How can i keep the first sum visible while i click on the second button? I tried with EnableViewState="true" but no succes.

Thanks.

My code:

<asp:Label ID="Label2" runat="server" Text="First number:"></asp:Label>
<asp:TextBox ID="TextBox1" runat="server" Width="25px"></asp:TextBox>
<asp:Label ID="Label3" runat="server" Text="Second number:"></asp:Label>
<asp:TextBox ID="TextBox2" runat="server" Width="25px"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Sum" OnClick="Button1_Click" />

<asp:Label ID="Label5" runat="server" Text="First number:"></asp:Label>  
<asp:TextBox ID="TextBox3" runat="server" Width="25px"></asp:TextBox></td>
<asp:Label ID="Label6" runat="server" Text="Second number:"></asp:Label>
<asp:TextBox ID="TextBox4" runat="server" Width="25px"></asp:TextBox></td>
<asp:Button ID="Button3" runat="server" Text="Sum" OnClick="Button2_Click" />

protected void Button1_Click(object sender, EventArgs e)
{
if (int.TryParse(TextBox1.Text, out g1) && int.TryParse(TextBox2.Text, out g2))
{
int sum = g1 + g2;
Label4.Text = sum.ToString();
}

protected void Button2_Click(object sender, EventArgs e)
{
if (int.TryParse(TextBox3.Text, out g1) && int.TryParse(TextBox4.Text, out g2))
{
int sum = g1 + g2;
Label7.Text = sum.ToString();
}
}
}