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Capturing a "lost focus" event in a web form text box

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Pipe2Path

Pipe2Path

Programmer
Aug 28, 2001
60
I have an ID textbox and a Description textbox on a web form. I want to capture the data entered into the ID text box, when the focus is lost from it, or the focus is on the description text box.

I don't see a text box event I can use for this. Can anyone help?

Thanks.
 
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descriptiontextbox.Attributes.Add("onFocus", "call a function here();")
 
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Thanks jbenson. Now, where does the statement
descriptiontextbox.Attributes.Add("onFocus", "call a function here();")

need to be added? I have added that into the InitializeComponent method, but that doesn't seem to work. The event doesn't seem to fire.

Thx
 
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Here is my code-behind, what am I doing wrong?

Thx

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient ;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace PartsInventoryRequest
{
/// <summary>
/// Summary description for WebForm1.
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DropDownList cmbTechList;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Label Label2;
protected System.Web.UI.WebControls.TextBox txtPartDescription;
protected System.Web.UI.WebControls.Label Label3;
protected System.Web.UI.WebControls.Button btnClear;
protected System.Web.UI.WebControls.Button btnRemove;
protected System.Web.UI.WebControls.Button btnDispatch;
protected System.Web.UI.WebControls.TextBox txtPartID;
protected System.Web.UI.WebControls.Button btnAdd;

private void Page_Load(object sender, System.EventArgs e)
{

}

#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
//
InitializeComponent();
base.OnInit(e);
}

private void InitializeComponent()
{
this.txtPartID.Attributes.Add ("onBlur", "ValidatePart();");
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion

public void ValidatePart()
{
string PartID = null ;
PartID = this.txtPartID.Text ;
}
}
 
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I'm sorry I should have been more clear. You can put the add attribute line in the page load event. The function call would be to a javascript function you add to the HTML in the <HEAD> section

<HEAD>
<script>
function myfunction()
{ do stuff here ...
}
<script>
<HEAD>

 
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Thanks jbenson. That approach did work, but I'm not looking
for a client side function. I want the function to reside on the server... Is there a way to run the function from
the server, as this function will be accessing the database, and I don't want intricacies of the db to be exposed.

Thanks.

 
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In order to do something onfocus or loss of focus you can only use client side script as they are client side events.
I guess you will just have to let the user enter the data, then have a button that will execute your DB code.

Jim
 
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Jim,

Thanks a lot for your prompt reply. Do you know if I can run asp code at the HTML level, even though my project is ASP.NET?

 
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try this method:


<HEAD>
<script>
function myfunction()
{ do stuff here ...
document.forms[0].HiddenField.value="Y"
}
<script>
<HEAD>

<input type="hidden" name="HiddenField" value="">



now in ur codebehind file's page_load:

if(Request.Forms["HiddenField"]=="Y")
{
Resposne.Write("CALLED!!!!");
}


Known is handfull, Unknown is worldfull
 
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