WPF for Dummies :)

Hello everyone..

Here I am giving a very basic XAML demo, especially for those lovely developers who have not yet code a single line in XAML, and who are just aware of XAML..well..its pretty simple..If you are using Visual Studio.NET 2005, you need to Download SDK for it, If you are using Orcas/VS2008 Beta2/VS RTM..then Life is easy for you as all the stuff is built-in.

You need to choose WPF application from File-> New -> Project

This will throw you in IDE and then you need to just play in XAML tab just next to Design.

<Grid>

<Button x:Name="Vikram"
Height="50" Width="200" Content="Click">

</Button>

</Grid>

 

This will allow you to put simple button on. On similar lines you can add Textbox also, so for adding textbox,you need to write following code.

 

<TextBox x:Name="Mytxt" Height="50" Margin="39,35,39,0" VerticalAlignment="Top"></TextBox>

 

So, lets do some more fun with this..lets rotate both in 45 Degrees..so you will now have to write down the Transform for this..This is how we do it.

 

<Grid>

<Button x:Name="Vikram" Content="Click" Height="50" Width="200"
>

<Button.RenderTransform>

<RotateTransform Angle="45">

</RotateTransform>

</Button.RenderTransform>

</Button>

<TextBox x:Name="Mytxt" Height="50" Margin="39,35,39,0" VerticalAlignment="Top">

<TextBox.RenderTransform>

<RotateTransform Angle="45">

</RotateTransform>

</TextBox.RenderTransform>

</TextBox>

</Grid>

 

So..here it is..First WPF application with XAML is ready to run!!

 

Hope..you will njoy those small codes..will come up with more soon..

 

Vikram

Retain Password in ViewState

Recently, while working on one assignment, there was a total new and funny situation I came across. I was working on User Registration Page, It was typical User Registration Page.

First few fields was like Username,Firstname etc. then it was Password field. Below that I was filling two combo boxes of City and State which was dependable on each other..So I was not having any choice but to post them back and fire SelectedIndex change event..All of the other information like Username,Firstname was in state and were able to retain their values which I key in them..but
don't know how..Password field was getting blank again and again.

One of my friend told me that this is because of Security reason,that we lost value in Password Textbox in Postback of page..Some people told me that its next to impossible to retain Password value in Postbacks and might be dangerous and against security policies.

But..I was not having choice as it was my task..so I tried out whole tons of experiment..All Sessions, Varibles,Constants,JavaScripts,HiddenFields,Enable ViewState..all stuff got simply failed..I was like no where..I then Google it..done few hits on Live engine and Yahoo..

Suddenly,I came across ViewState declarations on some forums..and It clicked.!!
I just wrote following piece of code and my 3 days research work got over finally..

ViewState["MyPassword"] = txtPassword.Text;
txtPassword.Attributes.Add("value",ViewState["MyPassword"].ToString());

and done with it..!!

Vikram.

Visit to Microsoft,Mumbai

Hi

It was a damm wonderful time last week..last weekend I went to Mumbai for MSP Boot Camp..MSP is Microsoft Student Partner..though I am not MSP but I went there on behalf of PuneUserGroup with whom I am from last 2 years.

It was total fun..and great learning exprience for me and my UG fellows.I attended "Soft skills" session by Sarang Datye who is MS employee,Then I attended Sanjay Vyas Session on "Power of Visuals", Then MVP Nauzad took quick and wonderful session on "WebServices in ASP.NET".

I played lot of games on XBOX there..there was a separate room for that..We after our session had total fun at our Hotel till Midnight 2 PM..we were shouting,Dancing,Singing Songs..loads of fun.It was very good exprience.

And how can I miss my journey from Pune to Mumbai with Sarang and Mahesh..we twice lost our road..we were just roaming on same road for 1 Hr..were totally confused by flyovers..and Most funny part was we were standing in front of Microsoft building..just few distance away..building was visible..but still..Mumbai roads and we were newbies..so it took us 20 mins..till that time we just moving round n round around the building..

Lovely journey overall..!! :)

Vikram.

Arrow Key Navigation in Textboxes

Hello everyone,

Well I decided today that instead of posting total theory stuff, lets do some hands around and coding..Few days ago..I had requirement which stated that when user press Down arrow and Up arrow, cursor should move accordingly in ASP.NET Form..It took my brain off for a while to implement such Javascript in this dynamically created Textboxes..but finally done with it.

Its working with Mozilla too ;)

HTML Code :

<head
runat="server">

<title>My Arrow Key Demo</title>

<script
language="javascript"
type="text/javascript"
>

function keyPressed(TB,e)

{

if(e.keyCode == 40 || e.keyCode == 13)

{

var i = parseInt(TB.substring(7,8)) + 1

document.getElementById("TextBox"+i).focus()

}

if(e.keyCode == 38)

{

var i = parseInt(TB.substring(7,8)) - 1

document.getElementById("TextBox"+i).focus()

}

}

</script>

</head>

<body>

<form
id="form1"
runat="server">

<div>

<br
/>

<asp:Table
ID="DataEntry1"
style="height:141px; background:#F7F7F7"
cellpadding="1"
border="1"
cellspacing="1"
runat
="server"
>

</asp:Table>

</div>

</form>

</body>

</html>

 

.NET Code

 

Protected
Sub Page_Load(ByVal sender As
Object, ByVal e As System.EventArgs) Handles
Me.Load

Try

Dim i As
Integer

For i = 1 To cnt

Dim tcell As
New TableCell

Dim trow As
New TableRow

Dim txtbx As
New TextBox

txtbx.ID = "TextBox" + i.ToString()

         'Add JavaScript to Textbox

txtbx.Attributes.Add("onkeyup", "keyPressed(this.id,event)")

txtbx.Width = 60

txtbx.Height = 13

tcell.Controls.Add(txtbx)

tcell.Width = 61

trow.Cells.Add(tcell)

trow.Style.Add("Align", "Center")

DataEntry1.Rows.Add(trow)

Next

Catch ex As Exception

Response.Write(ex.Message.ToString())

End
Try

End
Sub

Thats it...till the day we came across how to make Button as Default.Tab navigation which is by default..and here it is...ArrowKey navigation in Form.

 

Vikram Pendse.

Hello World !!

Keeping the tradition..lets start with

"Hello World" :)

Vikram.