WPF – Tech Talk

January 7, 2013

Invert a Color in C#

A very quick code snippet for you all today. I had encountered an issue where I needed to invert the text color from the background (color was changing consistently from the user). So after some googling and playing around, I created something to do just that for me. First we needed a method to take convert our color to a...

C#/WPF Comments: 0

June 25, 2012

The image cannot be decoded. The image header might be corrupted

I was recently trying to send to Telerik’s image editing control a jpeg image in a stream format. I was checking for the other types and using the appropriate format providers, but I kept getting an exception when working with JPEGs : The image cannot be decoded. The image header might be corrupted With the following code : So, I...

C#/WPF Comments: 4

June 1, 2012

Filter an ObservableCollection with a CollectionView in C#

Using an ObservableCollection and need to filter its contents? A quick and easy way I found was to create and bind to a CollectionView to perform the filtering for you. Step 1 : Create the Observable Collection The first step is to create the observable collection. This will work for objects or system type lists, so feel free to use...

C#/WPF Comments: 6

May 7, 2012

Saving and Loading a Byte Array To File in C#

Need a quick way to save a byte array to file and read back? So did I, and thought I’d include this simple code snippet for anybody who needed it as well. Includes Code : Saving to File Note below, there are two additional options (besides the name) you can include in the FileStream, FileMode and FileAccess. FileMode lets you...

C# Comment: 1

March 9, 2012

The ObjectContext instance has been disposed and can no longer be used for operations that require a connection.

Have you ever assigned a value to an IEnumerable from a database, then try to access in a foreach or something similar and get the following? “ObjectDisposedException was unhandled by user code : The ObjectContext instance has been disposed and can no longer be used for operations that require a connection.” If you are using a using statement with your entity context,...

C# Comments: 0

February 16, 2012

Binding a Combobox to an Enum in C# and WPF using XAML and MVVM

I saw a lot of posts on how to bind an enum to a combobox using code behind and C#, but since I was using MVVM, I needed a different solution. I basically wanted to bind a list of the enums in a maintenance view model, and have the the xaml handle the binding of the item list. To help...

Uncategorized Comments: 3

August 26, 2011

Quick Formatting Tips in Visual Studio 2010

Formatting code not only keeps OCD programmers like me sane being organized, it also helps with the readability of your code when ever you or somebody else views it for maintenance. However sometimes formatting the code quickly in Visual Studio 2010 is not exactly straight forward so I thought I’d give a few tips from what I learned so far,...

C#/Development Comments: 0

May 5, 2011

Open Documents and Media in WPF’s Web Browser Control in C#

Ever need to display a word document in the same application and didn’t want to shell execute word? Ever need to display text from a rich text file or regular text file? How about quickly displaying an image file? All of these could use there own controls in WPF (Document Viewer, Image control, etc..), however if you use the web browser...

C#/Development/WPF Comments: 6

March 11, 2011

Do a Like Statement in LINQ in C#

There has been a few times I needed to do a like statement in LINQ, but didn’t know exactly how to go about it. Just in case there are you out there looking for the same, I thought I would post what I did. For example, say you had this SQL statement : This would translate to LINQ code in...

C#/SQL/WPF Comments: 0

January 12, 2011

Replacing Names Quickly in Visual ‘s Find and Replace

Part of the perks of moving your application to MvvM, you dont have to name your controls since you are binding everything. This frees up resources when running your application. Since my application was fairly large, I decided to dabble in Visual ‘s regular expression to replace all the names. I ended up putting :

WPF Comments: 0

December 6, 2010

Constraining the Mouse to a Graphical Element

I was creating a dashboard application which I needed to give the ability to drag and move a widget around a tab control item.

WPF Comments: 0

February 20, 2010

WPF Filtering a Combobox

Setting Up the ComboBox So in WPF, I wanted to filter a combobox to treat it as an autocompletebox. Note : This tutorial expects you understand how to populate the combobox to have the data to filter. I started off enabling two items on the properties tab of the combobox. isEditable Allows the user to be able to type in...

WPF Comments: 3

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Tech Talk

Tag: WPF

Invert a Color in C#

The image cannot be decoded. The image header might be corrupted

Filter an ObservableCollection with a CollectionView in C#

Saving and Loading a Byte Array To File in C#

The ObjectContext instance has been disposed and can no longer be used for operations that require a connection.

Binding a Combobox to an Enum in C# and WPF using XAML and MVVM

Quick Formatting Tips in Visual Studio 2010

Open Documents and Media in WPF’s Web Browser Control in C#

Do a Like Statement in LINQ in C#

Replacing Names Quickly in Visual ‘s Find and Replace

Constraining the Mouse to a Graphical Element

WPF Filtering a Combobox

Tag: WPF

Invert a Color in C#

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The image cannot be decoded. The image header might be corrupted

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Filter an ObservableCollection with a CollectionView in C#

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Saving and Loading a Byte Array To File in C#

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The ObjectContext instance has been disposed and can no longer be used for operations that require a connection.

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Binding a Combobox to an Enum in C# and WPF using XAML and MVVM

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Quick Formatting Tips in Visual Studio 2010

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Open Documents and Media in WPF’s Web Browser Control in C#

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Do a Like Statement in LINQ in C#

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Replacing Names Quickly in Visual ‘s Find and Replace

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Constraining the Mouse to a Graphical Element

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WPF Filtering a Combobox

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