Refresh Textbox text in for loop

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Hi, This is lakshmana rao, i have a text box in updatepanel like this

ASP.NET

<asp:ScriptManager ID="ScriptManager1" runat="server">
     </asp:ScriptManager>     
     <asp:UpdateProgress ID="UpdateProgress1" AssociatedUpdatePanelID="UpdatePanel1" runat="server">
        <ProgressTemplate>
        </ProgressTemplate>
     </asp:UpdateProgress>
     <asp:UpdatePanel ID="UpdatePanel1" UpdateMode="Conditional" runat="server">
            <Triggers> 
            <asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />               
            </Triggers>
        <ContentTemplate>
        <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
        <asp:Timer ID="Timer1" runat="server" Interval="10" EnableViewState="false" Enabled="False">
        </asp:Timer>
        <asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True"></asp:TextBox>
        </ContentTemplate>
        </asp:UpdatePanel>

And The VB code is

VB

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        For intindex As Integer = 1 To 10
            TextBox1.Text = intindex.ToString
            UpdatePanel1.Update()
        Next
    End Sub

when i run this code in for loop the loop values are assigned to textbox text property but it can't displayed in the textboxes, only last record is displayed in the textbox. can any one suggest me how can i get simultaneously with for loop my textbox values are changed.

Posted 31-Aug-12 0:38am

lakshmanarao.vemula

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[no name] 31-Aug-12 7:02am

"TextBox1.Text = intindex.ToString"... what ever it is that you eventually want to do, this is assigning the text to the textbox not adding to it which seems to be what your question is. So when your loop is done, all you are going to see is the last value. "how can i get simultaneously with for loop my textbox" makes no sense at all.

2 solutions

Solution 2

Simple:

VB

TextBox1.Text &= intindex.ToString

Posted 31-Aug-12 2:53am

Raimis9

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OriginalGriff · Accepted Answer · 2012-08-31T01:25:00

Solution 1

Try:

VB

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim sb As New StringBuilder
    For intindex As Integer = 1 To 10
        sb.AppendFormat("{0} ", intindex)
    Next
    TextBox1.Text = sb.ToString()
    UpdatePanel1.Update()
End Sub

Posted 31-Aug-12 1:25am

OriginalGriff

v2

Comments

lakshmanarao.vemula 1-Sep-12 1:09am

thx, its working but i want only one value at a time. i don't want append the values.i want change text every loop.

OriginalGriff 1-Sep-12 3:14am

You can't - without removing the loop!
If you want the value to change each time you press the button, then that is just a case of removing the loop and doing one "iteration" manually each time you get the Click event. But once you get the click event, nothing else will happen until the event handler ends - on screen updates, no nothing. So if you loop in the handler, only the final result of the loop will ever be shown.

It's like dealing cards from a pack - if you deal off five cards face up into a pile on the table, when you have finished you can only see the last card you dealt, no matter how many times you deal out five cards.

lakshmanarao.vemula 1-Sep-12 5:12am

is there any other way

OriginalGriff 1-Sep-12 5:17am

No :laugh:
Think of a text box as the pile of cards I mentioned. It can only show the one card at a time. The only way to make it change it's text would be as a result of an event - the button click event, or you could set up a timer. But you can't just say "display this, no this, no this", and expect the user to be able to see them all! :laugh: