Data-binding taking too long to update

Posted by Justin on Stack Overflow See other posts from Stack Overflow or by Justin
Published on 2010-04-24T18:05:48Z Indexed on 2010/04/24 18:33 UTC
Read the original article Hit count: 120

Filed under:

databinding

|

textbox

|

mvvm

|

wpf

|

c#

In my application I have this code in my view model:

hiddenTextContainer.PreHideVerticalOffset = VerticalOffset;

            hiddenTextContainer.HiddenText = Text.Remove(SelectionStart, SelectionLength);
            hiddenTextContainer.HasHiddenText = true;
            hiddenTextContainer.NonHiddenTextStart = SelectionStart;
            Text = Text.Substring(SelectionStart, SelectionLength);           
            SelectionStart = Text.Length;

            hiddenTextContainer.ImmediatePostHideVerticalOffset = VerticalOffset;

This code is used to hide selected text in a textbox. Text is a string property data bound to the text property of a textbox and VerticalOffset is a double property data bound to the VerticalOffset property of that same textbox.

I need to save the VerticalOffset before and after the hiding of selected text takes place, but with my code below both hiddenTextContainer.PreHideVerticalOffset and hiddenTextContainer.ImmediatePostHideVerticalOffset are always set to the same value no matter what.

I have figured out that this is because the text of the textbox has not been updated by the time the code reaches: hiddenTextContainer.ImmediatePostHideVerticalOffset = VerticalOffset;

Is there any way I can fix this?

© Stack Overflow or respective owner

Related posts about databinding

WPF Databinding- Not your fathers databinding Part 1-3

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
As Promised here is my advanced databinding presentation from South Florida Code camp and also Orlando Code camp. you can find the demo files here. http://ssccinc.com/wpfdatabinding.zip Here is a quick description of the first demos, there will be 2 other Blogposting in the next few days getting… >>> More
WPF DataBinding, CollectionViewSource, INotifyPropertyChanged

as seen on Stack Overflow - Search for 'Stack Overflow'
First time when I tried to do something in WPF, I was puzzled with WPF DataBinding. Then I studied thorougly next example on MSDN: http://msdn.microsoft.com/en-us/library/ms771319(v=VS.90).aspx Now, I quite understand how to use Master-Detail paradigm for a form which takes data from one source (one… >>> More
winforms databinding best practices

as seen on Stack Overflow - Search for 'Stack Overflow'
Demands / problems: I would like to bind multiple properties of an entity to controls in a form. Some of which are read only from time to time (according to business logic). When using an entity that implements INotifyPropertyChanged as the DataSource, every change notification refreshes all the… >>> More
Databinding a multiselect ListBox in a FormView control

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a multiselect ListBox within a FormView. I can't figure out how to setup the databinding for it. I can populate the listbox fine. If the listbox was a single select I could use say SelectValue='<%#Bind("col")%>' and that works fine. Is there something that I can bind to for a multiselect… >>> More
JavaScript Data Binding Frameworks

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
Data binding is where it’s at now days when it comes to building client-centric Web applications. Developers experienced with desktop frameworks like WPF or web frameworks like ASP.NET, Silverlight, or others are used to being able to take model objects containing data and bind them to UI controls… >>> More

Related posts about textbox

Display weekday in textbox or label using date from textbox

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a textbox with calendar extender and a label <label for="<%= tbxFrom.ClientID %>"> From</label> <asp:Label ID="lblWeekDayFrom" runat="server"></asp:Label> <asp:TextBox ID="tbxFrom" runat="server" CssClass="Calendar"></asp:TextBox> … >>> More
cast value of a textbox to a textbox in another form

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to paste the values from a textbox in form1 to textbox in form2. I did that, but while i upgraded my aplication it stopped to work. I allso need that couse i get an error(incorect data type in conditional statement) when i want to insert a value from a textbox (to a access database) that's… >>> More
Populate Textbox in UserForm Using Contents of Another Textbox

as seen on Stack Overflow - Search for 'Stack Overflow'
I have 5 worksheets and would like all the textboxes to display the same value, whatever the user enters in the first textbox. Can that be done without code? How would I do it with code? >>> More
Binding "Text-Property" of a derived textbox to another textbox doesn´t work

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, i have a class 'MyTextBox' that derives from the default TextBox in Silverlight. This class currently contains no additional code. I set up a binding in xaml to bind the Text-Property of MyTextbox to another Textbox to reflect the input made in the Textbox. The effect is that MyTextBox doesn´t… >>> More
Using an HTML Textbox in place of an ASP.NET TextBox

as seen on Stack Overflow - Search for 'Stack Overflow'
If I add this to the ASPX page: <input id="Text1" type="text" value="Text1Value" /> I would expect to see "Text1" in the list of Request Form keys even WITHOUT setting the runat=Server property. ? request.Form.AllKeys I realize that if I do set that propery, then I will have a server-sided… >>> More