asked on

ASP.NET - select text in a textbox with javascript

I am validating some user entered text on the server side in my VB code. If the validation fails I would like to select the text in the textbox. How do I select the text with Javascripts. Examples would be most helpful.

lachmann

ASKER

Wow. I expected to be flooded with solution with what appears to be a simple javascript question. Maybe EE isn't the place that it used to be.

lachmann

ASKER

Perhaps more info on My side would be helpful
Here is the JavaScript Function which is in a .js file that is pulled into the masterpage
function SelectAll(id)
{
document.getElementById(id).focus();
document.getElementById(id).select();
}

Here is some of the vb.net code in the page code behind.
Private Sub ValidateField()
If Me.tbfield1.Text.Length < 10 Then
'call the javascript function
End If
End Sub

I am looking for what I need to do to call the javascript function.

Thanks,
Phil.

ASKER CERTIFIED SOLUTION

Rahul Gade

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leakim971

Use :

Protected Sub ValidateField(sender As Object, e As System.EventArgs) Handles Button1.Click

        If Me.tbfield1.Text.Length < 10 Then
            Dim javascript As String = "SelectAll('" & tbfield1.ClientID & "')"
            ClientScript.RegisterStartupScript(Me.GetType, "Startup", javascript, True)
        End If

    End Sub

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test page :

<%@ Page Title="Page d'accueil" Language="VB" MasterPageFile="~/Site.Master" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
<script language="javascript" type="text/javascript">
    function SelectAll(id) {
        document.getElementById(id).focus();
        document.getElementById(id).select();
    }
</script>
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<asp:TextBox runat="server" ID="tbfield1" ></asp:TextBox>
<br />
<asp:Button runat="server" ID="Button1" Text="Submit" />
</asp:Content>

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code behind :

Partial Class _Default
    Inherits System.Web.UI.Page


    Protected Sub ValidateField(sender As Object, e As System.EventArgs) Handles Button1.Click

        If Me.tbfield1.Text.Length < 10 Then
            Dim javascript As String = "SelectAll('" & tbfield1.ClientID & "')"
            ClientScript.RegisterStartupScript(Me.GetType, "Startup", javascript, True)
        End If

    End Sub
End Class

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