How to disable postback on click of a button in the Gridview? - vb.net

i am working on vb.net.
When i click a button in one of the row in the gridview, i am called a function to delete the data of tha row. it is working but it is getting postback.
i have placed gridview inside asp updatepanel.
How to prevent postback.

Do you have made your UpdatePanel's UpdateMode="Conditional"? You can define AsyncPostbackTriggers to f.e. your delete-button(eventname is optional and for button click is default).
To delete your row you have to delete it from the gridview's datasource and then rebind it to it.

Related

Datagridview transfer selected rows

How can I transfer selected rows from datagridview to another datagridview in another form? I'm having trouble with this.
You should be able to do that in in one of gridview event handlers. I would use
RowCommand Occurs when a button is clicked in a GridView control.
But you can do it any other event that meets your needs. Both the Gridview must be on same page so you can access them from code behind. You can access any control on the page using code behind, including GridView. You should be able to add contents/remove contents as needed. Make sure you issue databaind on both gridviews so they are rendered fresh after the changes. So basically you need code behind :)

GridView RowDataBound event makes my GridView slow

I have a PopupExtender that shows some information when a button in the GridView is pressed. This button exists on every row.
I also have a DropDownList present in every row that is populated by querying a database. I do this because it may be populated with different items depending on the row.
The problem I have is that the PopupExtender is slow to pop-up because of the RowDataBound event of the GridView that repopulates the DDLs from the database when the PopupExtender's associated button is pressed.
How can I make the PopUpExtender pop-up faster?
You may need to consider jQuery Dialog instead of Asp.Net ajax popup extender.
http://jqueryui.com/dialog/.
Also, do you really need gridview, You can try ListView control instead of GridView.

Usercontrol and Page Postback

I have a page with three radio buttons and a calendar usercontrol. The radio buttons have autopostback and depending on which one you click it should change the calendar availabilities based on the selected index. The problem is that the page load of the calendar is executing first before the selected index change (where I am setting the needed id).
Any suggestions?
You shouldn't initialize your Calendar-Control automatically in Page_Load. It should only be initialized through a public method. You could call this method If Not Page.IsPostback with default-settings and from your SelectedIndexChanged event-handler with the selected value(s) as parameter(s).

How can I make a Wicket form save radio button state?

I want to have a repeater like DataView or ListView. The first column of each row (named User ID) should be read from a List, and for each user ID, the program should dynamically create three radio buttons like these:
Requirements:
The user must able to change selection of radio buttons.
When the user clicks the submit button, radio values be displayed using the info("") method.
I've already done this by using this example, but when I click the submit button, old selections are shown, and the form gets reset to those old selections.
This example code might be helpful.
ListView doesn't play very well with form components, but it may work if you call ListView.setReuseItems(true);.

Silverlight 4: DataForm, currentItem and AutoCommit

I have a DataGrid and a DataForm. I'm assigning data to the DataForm with the currently selected Item in the datagrid individually as DataForm.CurrentItem. This means that I do not have any Next/Previous button on the DataForm and the user can switch to any row in the DataGrid.
My problem is that although I have set the property AutoCommit="True" on the DataForm, if the user edits something and clicks on another record in the DataGrid, it crashes.
How can I force it to save the DataForm when the user moves away from the form?
I got this working but I'm not sure whether this is correct. On SelectionChanged event of datagrid I added the following:
DataForm.CommitEdit();
and it stopped crashing and giving me the error. If anyone else has a better solution please do let me know.