by Pieter Brinkman
24. September 2010 08:47
As proof of concept I wanted to sort images in a Grid by keyboard. The sort logic needed to be implemented on the server. My solution for this problem is a combination of Javascript and C#.
First add following html to you .aspx. Notice that the body tag has runat=”server” and a ID.
[code:html] <body runat="server" ID="bodyTag"> <form id="form1" runat="server"><asp:Button runat="server" Text="Up" ID="UpButton" CommandArgument="up" oncommand="DownButton_Command" /><br /><asp:Button runat="server" Text="Left" ID="LeftButton" CommandArgument="left" oncommand="DownButton_Command" /><asp:Button runat="server" Text="Right" ID="RightButton" oncommand="DownButton_Command" CommandArgument="right" /><br /><asp:Button runat="server" Text="Down" ID="DownButton" oncommand="DownButton_Command" CommandArgument="down" /><br /><asp:Label runat="server" ID="clickedLabel" /></form></body>[/code]
Now add the following JavaScript to your page. This script will fetch all keyboard input and press the corresponding button.
[code:js]
<script language="JavaScript">
document.onkeydown = checkKeycode
function checkKeycode(e) {
var keycode;
if (window.event) keycode = window.event.keyCode;
else if (e) keycode = e.which;
switch (keycode) {
case 37:
var obj = document.getElementById('<%=LeftButton.ClientID%>');
obj.focus();
obj.click();
break;
case 38:
var obj = document.getElementById('<%=UpButton.ClientID%>');
obj.focus();
obj.click();
break;
case 39:
var obj = document.getElementById('<%=RightButton.ClientID%>');
obj.focus();
obj.click();
break;
case 40:
var obj = document.getElementById('<%=DownButton.ClientID%>');
obj.focus();
obj.click();
break;
}
}
</script>
[/code]
At last we need to add the following C# code to the page.
[code:c#]
protected void Page_Load(object sender, EventArgs e)
{
//Ad clientside onkeypress event to the body
bodyTag.Attributes.Add("OnKeyPress", "keyhandlers()");
}
protected void DownButton_Command(object sender, CommandEventArgs e)
{
//Just for testing
clickedLabel.Text = (string)e.CommandArgument;
}
[/code]
Enjoy, Pieter
by Pieter Brinkman
27. April 2010 04:43
I use the following method to return a parent control of a specific type. This method is recursive and uses generics.
[code:c#]
private Control GetParentControl<T1>(Control control)
{
if (control.Parent.GetType() == typeof(T1))
{
return control.Parent;
}
else
{
return GetParentControl<T1>(control.Parent);
}
}
[/code]
by Pieter Brinkman
19. April 2010 09:25
With the following code you can convert your MemoryStream to a Byte Array.
[code:c#]
//create new Bite Array
byte[] biteArray = new byte[memoryStream.Length];
//Set pointer to the beginning of the stream
memoryStream.Position = 0;
//Read the entire stream
memoryStream.Read(biteArray, 0, (int)memoryStream.Length);
[/code]
by Pieter Brinkman
25. February 2010 09:58
Create a Visual Studio add-in with contextmenu and selected text as input
When working with a new way of storing settings in a database. I was frustrated how much work it was to check the value of setting from code. So I deceided to make my life a bit easier by creating a VS2008 contextmenu add-in. With this add-in I can select text within VS and use the value of the selected text within the add-in popup. The hardest part was figuring out how to create a contextmenu and how to use the selected text as input value.
In this blogpost I will show how to create a Visual Studio contextmenu add-in and pass the selected text to the pop-up. I’m not going to explain how to create an add-in you can easily find articles about this on MSDN or blogs (just try Google).
Now let’s get started. Create an new Visual Studio add-in project and add the following code to the OnConnetion Method within the Connect.cs. This code will insert add the contextmenu.
[code:c#]
_applicationObject = (DTE2)application;
CommandBars cBars = (CommandBars)_applicationObject.CommandBars;
CommandBar editorCommandBar = (CommandBar)cBars["Editor Context Menus"];
CommandBarPopup editPopUp = (CommandBarPopup)editorCommandBar.Controls["Code Window"];
Command command = commands.AddNamedCommand2(_addInInstance,
"GetSetting", "Bekijk Setting", "Executes the command for test", true, 733, ref contextGUIDS,
(int)vsCommandStatus.vsCommandStatusSupported + (int)vsCommandStatus.vsCommandStatusEnabled,
(int)vsCommandStyle.vsCommandStylePictAndText,
vsCommandControlType.vsCommandControlTypeButton);
[/code]
Then to get the selected text I use the following method within the Exec of the Connect.cs and pass the selected text (return value) to a property of a Windows Form pop-up.
[code:c#]
private string GetSelection()
{
string setting =
"";
//Check active document
if (_applicationObject.ActiveDocument != null)
{
//Get active document
TextDocument objTextDocument = (TextDocument)_applicationObject.ActiveDocument.Object("");
TextSelection objTextSelection = objTextDocument.Selection;
if (!String.IsNullOrEmpty(objTextSelection.Text))
{
//Get selected text
setting = objTextSelection.Text;
}
}
return setting;
}
[/code]
Hope it helps.
Cheers,
Pieter
by Pieter Brinkman
26. January 2010 03:29
With the following code you can remove a line from a textfile (web.config). If the string is within a line the line will be removed.
[code:c#]
string configFile = @"C:\dev\web.config";
List<string> lineList = File.ReadAllLines(configFile).ToList();
lineList = lineList.Where(x => x.IndexOf("<!--") <= 0).ToList();
File.WriteAllLines(configFile, lineList.ToArray());
[/code]
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