The above error occurs on a SelectedIndexChanged click event on a listbox.
in debug the value returned is "", however when you look at the webpage source code there are definitely values.
Here's my listbox:
"WPF command support in ComboBox", this page shows how to extend a combobox to support a command, but it didn't give a dome of the delegate command that maps to the combobox's SelectedIndexChanged event. Now the problem I face is how can I handle…
I have a checkboxlist control in one of the web application. I want to use javascript to handle the SelectedIndexChanged event.
The checkbox list is like
One
…
I was surprised, that SelectedIndexChanged on a ComboBox with ComboBox.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList can be bypassed by changing the shown value to another one.
Here are steps to reproduce the case:
Create a Form…
How can I get the selected item on the SelectedIndexChanging handler when using two SelectCommands? I can get the selected row through e.SelectedRow but I'm unable to get the selected column.
It's correct to have more than one SelectCommand in a…
I have a repeater with a dropdownlist in it. When a user changes its index, I would like a label to change its value. (the ddlSizes values come from a MySQL DB)
Sizes.aspx
So I have a set up like the answer for this post:
display list of custom objects as a drop-down in the PropertiesGrid
, where I have a property tree and I need one of them to have a dropdown which I fill from a string array.
Im using…
I've found many posts where people try to work around the problem of SelectedIndexChanged not working when EnableViewState='false'.
Im a little confused why control state doesnt kick in and allow it to work, but thats bonus points if anyone can…
I've noticed that when i populate textboxes from a selected row in a gridview that if the field is blank it displays " " in the textbox.
Here is the solution I came up with. I check each cell before adding it to the textbox.
I get the feeling…
So, basically I'm using a ComboBox.SelectedIndexChanged event to fill 5 more ComboBoxs wich each have their own SelectedIndexChanged event as well.
The problem is that when the first SelectedIndexChanged event fires to fill the rest.. it also fires…
I have an issue with both Dropdownlist_OnSelectedIndexChanged and Checkbox_OnCheckedChanged events not firing from within an UpdatePanel after the UpdatePanel has been updated from the code behind.
As you can see from the code below the DropDownList…
I'm developing a software and I have a little trouble. I have two combobox, the first one fills the second one but if the first combobox has a value which is equal than -1, then the second combobox is not enable. This is a peace of my code:
private…
I've got a button on a Windows Form that starts off disabled (Enabled = false).
I want to enable it when the user has selected an item from a combobox, and checked at least one item from a CheckedListBox. The user can check/uncheck all the items in…
In the combo box I can get it to load all the conversions to the combo box. But, when I click a conversion from the combo box it changes the data to null for some reason. I am not sure if anyone can help me without looking at all my code. But I…
