Hi,

I am having a textbox.. I have set its autopostback property as true and have done the proper coding on its textchanged event

Now My Concerns Are

1. this event fires when my focus  leaves the textbox.

2. I want to call the same piece of code of c# which i have done on textchanged event while user changes the text of the text box.. i.e. as user tpes the code should be called..

Please Help

For number two you should just create a separate function in your code behind and then call that from both areas (text changed and lost focus).

The TextChanged  event is not raised as the user types in the textbox.  it is raised only after the entire page has been posted back to the server and only if the textbox was updated.

Meetu Choudhary:

1. this event fires when my focus  leaves the textbox.

no.  when the textbox loses focus, this is a client side event.  you'd need to use javascript to detect this.

Meetu Choudhary:

2. I want to call the same piece of code of c# which i have done on textchanged event while user changes the text of the text box.. i.e. as user tpes the code should be called..

when the user is typing, you can capture the keystrokes using javascript.  these keystroke do not raise events at the server though.

but what if i want to fetch data from the database at every keystorke

You can use web service to call webservice in java script function.

• http://www.asp.net/AJAX/AjaxControlToolkit/Samples/AutoComplete/AutoComplete.aspx

rtpHarry:

This will let you do an autocomplete drop down:

• http://www.asp.net/AJAX/AjaxControlToolkit/Samples/AutoComplete/AutoComplete.aspx

I dont want to use this control i have some my specifications

so i have to  make control accordingly

Meetu Choudhary:

but what if i want to fetch data from the database at every keystorke

Hi Meetu Choudhary,

I suggest you have a try on TextBox's AutoCompleteType Property.

You can refer to this link for more information: http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.textbox.autocompletetype.aspx

Best Regards,
Shengqing Yang

Hi Meetu Choudhary,

Here is another demo I worked for you just now.

It uses a Button whose display is "none" to call the function in the Code-Behind and when the users press in the TextBox, a JavaScript funtion will fired to click the Button. 

<script type="text/javascript">
    function callsub() {
        document.getElementById("Hidden1").value = document.getElementById("TextBox1").value
        document.getElementById("Button1").click();
    }
    function moveindex() {
        var rng = document.selection.createRange();
        rng.moveStart("character", 200);
        rng.select();
    }     
</script>

<asp:TextBox ID="TextBox1" runat="server" onkeyup="callsub()" onfocus="moveindex()"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" style="display:none" />
<input id="Hidden1" type="hidden" runat="server" />

Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
    Response.Write(Now)
    TextBox1.Focus()
    TextBox1.Text = Hidden1.Value

End Sub

You can write your own code in the Button1_Click event handler.

Best Regards,
Shengqing Yang

Thank you very much for the code

but coude you please explain me the  utility of the following piece of code

Shengqing Yang - MSFT:

    function moveindex() {
        var rng = document.selection.createRange();
        rng.moveStart("character", 200);
        rng.select();
    }     

Meetu Choudhary:

Thank you very much for the code

but coude you please explain me the  utility of the following piece of code

Hi Meetu Choudhary,

When everytime the TextBox gets focus, the cursor in the TextBox will always be before the first character.

This piece of code can let the cursor locate after the last character.

Best Regards,
Shengqing Yang

Shengqing Yang - MSFT:

Meetu Choudhary:

Thank you very much for the code

but coude you please explain me the  utility of the following piece of code

Hi Meetu Choudhary,

When everytime the TextBox gets focus, the cursor in the TextBox will always be before the first character.

This piece of code can let the cursor locate after the last character.

Best Regards,
Shengqing Yang

Thank You Sir Thank You Very Much

Glad to be helpful

Best Regards,
Shengqing Yang

 Sir i Tried a lot to understand what each line of code is performing and how but i was not able to understand could you please explain the worth and purpose of each line of the following code given by you

function moveindex() {
        var rng = document.selection.createRange();
        rng.moveStart("character", 200);
        rng.select();
    }  

Hi,

Here is a very detail reference you can have a look: http://www.w3.org/TR/DOM-Level-2-Traversal-Range/ranges.html

And also go through the article TextArea Cursor Position with JavaScript @ http://weblogs.asp.net/skillet/archive/2005/03/24/395838.aspx

I think these will be much helpful for you to understand the code.

Best Regards,
Shengqing Yang