Textbox not updating


19-Jan-2020 00:42

Try this modification: Now what happens is that when a Post Back happens, it will not run the initialization code and it will continue on to your button click event where you can update the value of the your textbox.Page Load is really the only place you need to check to see if it is a postback in this situation, since button events can only be triggered by a postback.In the following example, the highlighted lines of code show that the As a result, the Text Block shows the same text (because the source changes) as the user enters text into the Text Box, as illustrated by the following screenshot of the sample: If you have a dialog or a user-editable form and you want to defer source updates until the user is finished editing the fields and clicks "OK", you can set the Update Source Trigger value of your bindings to Explicit, as in the following example: Note You can use the same technique for properties of other controls, but keep in mind that most other properties have a default Update Source Trigger value of Property Changed.For more information, see the Update Source Trigger property page.The crazy thing is this Text Box’s are all defined the same way, i tried changing the name, the property and always the same thing, the binding for the last Text Box in the list doesn’t work at all. Here is a little hint @afree, I guess when writing into those Text Box’s you actually do it from the top most one and going down, thus the last one to get your changes is always the bottom most Text Box.Now can you try to do it in reverse, Write something (test values) into Text Box’s from the Bottom most Text Box, and going up to the Top Most one. I believe now you found out, that not the position of the Textbox that affects whether its changes are being applied back to the source or not, but in fact whether or not the Text Box is the last one to get your Changes.It seems to work well and set values into the text box on the page load and get them on a button press event.However, if I make a change to any of the textboxes, the updated value is not captured in the text box.

If you want the source to be updated as you type, set the Update Source Trigger of the binding to Property Changed.

in the dependency property, I check for the value if it is valid, do nothing if valid and assign old value if not valid.

In case of value not valid, when I assign it that old value, property updates but it is not displaying updated value in my public string Name // Using a Dependency Property as the backing store for Name. public static readonly Dependency Property Name Property = Dependency Property.

Roger Swetnam The event handler is as follows: public partial class Staff_Admin_User Edit Test : System. However, I I set that value on load and then change John to Roger in the textbox, when I press the btn Save, I still get the value "John" for str Revised.

Thanks, Roger Every time the page gets loaded regardless of whether the page refresh happens through button click or normal Page refresh, the Page_Load event gets fired before any other event thus the value of the text box remains "John" all the time, to stop this behaviour you'll have to check whether the page refresh happens thru a post back or normal refresh while assigning value to the controls.

The page load will be called on every postback, so make sure you don't run initialization code twice.



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