I used asp.net server side control to display and modify data in database, the control is just like this one:
http://demos.telerik.com/aspnet-ajax/grid/examples/dataediting/alleditablecolumns/defaultcs.aspx
what I want to do is after I click the "edit" button it will display a "edit" ui, and I want everytime I modify the data in the text box, asp.net will automatically click the "update" button for me to update the data i entered.
I tried to call the event handler, but failed.
There is a update command in asp.net, and how to programmatically call it ?
Try this. You can get the event refernce via this code
string postbackEvent = this.ClientScript.GetPostBackEventReference(this.button,"");
the postbackEvent will contains a __doPostback() function, which will invoke the button click in the server side. Assign this to some event, like onBlur of textbox.
this.txtSample.Attributes.Add("onBlur",postbackEvent);
Probably you will have to use the onTextChanged event of your TextBox control.
Set the autopostback attribute to "true"
<asp:TextBox AutoPostBack="True" ID="somethingID" OnTextChanged="CallSomeMethod" />
Look here : http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.textbox.autopostback.aspx
Related
Good day,
I have a problem in a .NET page where I am using an asp:textbox in combination with an OnClick action on a link button.
What happens is that after text has been entered into the textbox, if you directly click on the link button, more often than not the textbox is considered to be null.
If you click off the text box first then click the link, all is well and the save function performed by the link button proceeds as expected.
My assumption is that there is a lifecycle event that is being missed, or not applied which is not binding the text to the textbox for use in the codebehind when the link button is clicked.
The question is, what can i do to enforce that binding short of doing something like adding an onkeypress event to the textbox to force a postback.
There must be a more elegant solution.
Thank you in advance for your help.
Do you have initializations on your textbox inside Page_Load event? If so, use IsPostBack=false and put the initialization inside.
If IsPostBack =False Then
TextBox1.text=""
End If
i want my textbox to fire a textChanged client side (JS) event when a text is changed inside it.
i read many posts about it. most of them are talking about a code-behind event and the ones that talk about the client side tells to add attribute of onchange:
<asp:TextBox runat="server" ID="TextBox1" onchange="javascript: ontextchanged();"></asp:TextBox>
but this event only fires when i lose the focus on the textbox.
what is the solution to this ?
how can i fire a JS function each time a text is changed inside the textbox?
Use onkeyup or onkeydown instead.
This will then run the function when you type or click on the textbox. You can also then detect the keycode of the event, and prevent the function if you dont want it to run for certain keys.
Try this http://www.zurb.com/playground/jquery-text-change-custom-event
How do I determine which SELECT button was clicked in a GridView?
The multiple SELECT buttons will be used for an application approval process.
If you are using Grid's Builtin Command buttons that you can easily recognize them using command name property of GridView_ItemCommand event of the grid.
You can listen to the RowCommand event from the GridView and handle the click from a button. On the button, you can set CommandArgument if you need to pass any data from the grid to the handler.
I am building a user registration form in asp.net. I want to check if the username is available or not on the leave event of the TextBox. I am not able to get the Leave Event of the TextBox.
Should I use OnBlur event of the Html TextBox.
Please Help.
How about using TextChanged server-side event and wrapping the whole thing in an UpdatePanel for very quick ajax functionality.
If you use this method make sure the AutoPostBack property is set to true for the TextBox control.
I'm binding a hashtable to a detailsview web control in ASP.NET 2.0. I have my edit/delete/insert link buttons on the detailsview, but when clicking new, the mode does not change.
Any ideas why?
I'm assuming that you have created a 'New' Button within the DetailsView. You should be able to simply handle the click event in your CodeBehind, and call the DetailsView.ChangeMode Method.
DetailsViewName.ChangeMode(DetailsViewMode.Insert)
DetailsViewName.DataBind()
In this case, I simply rebinded the DetailsView to show a blank form. You can also use the Click event to bind controls within the DetailsView form as well.
Fill out the form, click Add, and the Item_Inserting Event should get handled.