ASP.NET 4.0 New Feature- RepeatLayout property for CheckBoxList and RadioButtonList Controls.

ASP.NET 4.0 having many many new features. One of them is the RepeatLayout property for the CheckBoxList and RadioButtonList controls. The property is useful when we need decide how this controls will be render as html when its load in browser .

Code Snippet

1. <div>
2. <asp:CheckBoxList ID="checkboxList" runat="server" RepeatLayout=UnorderedList>
3. <asp:ListItem Text="Checkbox1" Value="1"></asp:ListItem>
4. <asp:ListItem Text="Checkbox2" Value="2"></asp:ListItem>
5. </asp:CheckBoxList>
6. </div>
7. 
   

There are four options available there.

1. Flow
2. OrderedList
3. Table
4. UnorderedList

Flow: This option will render control with span tag. This option will be better when you need tables less html for your site.

OrderedList:This option will load contriol as orderedlist. It will load html with <ol> and <li> Tags.

Table:If you love table structure then this is the option for you it will load html with <table><tr> and <td> tags.

UnorderedList: This option will load control as UnorderedList. It will load with <ul> and <li> tags.

So this property will useful when you want to have more control over html rendering in your browser as per your requirement.

Happy Programming...

Technorati Tags: ASP.NET 4.0,C#.NET4.0,RadioButtonList,CheckBoxList

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C# 4.0 New feature - Named Parameter

C# 4.0 has one new cool features which is the named parameter. Suppose you have so many parameter in function and when you call them its hard to remember the sequence of the code now with the named parameter you can have name of the parameter with value like Parameter:value and one another cool feature of the name parameter is the you don't need to pass the parameter in exact sequence. Let see the following example

Code Snippet

1. protected void Page_Load(object sender, EventArgs e)
2. {
3. foreach (int i in Square( max:10,min:1))
4. {
5. Response.Write(i.ToString() + " ");
6. }
7. }
8. 
   
9. public static IEnumerable<int> Square(int min, int max)
10. {
11. for (int i = min; i < max; i++)
12. {
13. yield return i*i;
14. }
15. }
16. 
    

In above example I am having a function called square with two parameter min and max and having a function which will return the square of the given range between min and max. See the for each loop carefully. I have named parameters and another thing you will notice that i have changed the sequence of parameter but still its working fine. So this is a very cool new feature from the C# 4.0.

Happy Programming...

Technorati Tags: C#4.0,ASP.NET 4.0

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Visual Studio 2010- New Features Selected Text.

I am loving more and more visual studio 2010 for some of the cool things. One of the new feature i have found in visual studio 2010 is the selected text. In the earlier version of visual studio 2010 when we select tax then its not maintaining the highlighted code but with visual studio 2010 it is maintain the colored syntax. Isn't that cool?. We can still know that what we are selecting. Like following.

Technorati Tags: Visual Studio 2010,Visual Web Developer 2010,New Features

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Yield statement in C#

Yield statement is one of most interesting statement in the C# 2.0. I have heard about lot of yield statement but today i have learned about yield statement. Yield statement can be used to return multiple object from a method while retaining its state. You can get item in sequence with help of yield.Let take a simple example to see the power or yield statement.

Let's create one example which will help you the understand how its works Let create a function will return the square each time this function is called.

Code Snippet

1. public static IEnumerable<int> Square(int min, int max)
2. {
3. for (int i = min; i < max; i++)
4. {
5. yield return i*i;
6. }
7. }
8. 
   

Now each time this method is called it will return the square of current value within a given range and its also maintains the state between calls. Let create for each loop to call the the square function above.

Code Snippet

1. foreach (int i in Square(1, 10))
2. {
3. Response.Write(i.ToString() + " ");
4. }
5. 
   

And here will be the output in the browser.

So it will create IEnumerable without implementing any interface and lesser code.

Happy Programming..

Technorati Tags: C# 3.0,C# 4.0,Yield

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C# 4.0 - Optional Parameters

With .net framework 4.0 and C# 4.0 also introduces a new feature called optional parameters it was there in VB since visual basic 6.0. But it is now available in the C# with 4.0 version. Optional parameter will be become very handy when you don't want to pass some parameter and just you need the default value. For that Till C# 3.0 we need to create overloaded functions where we creating function with different argument with same function name. Let's see how its works

Let's go through a simple scenario we will create function with simple response.write which will print a string which will be optional argument.

Code Snippet

1. protected void Page_Load(object sender, EventArgs e)
2. {
3. PrintMessage();
4. PrintMessage("This is message to print passed as argument");
5. }
6. private void PrintMessage(string MessageToPrint="This is default message to print")
7. {
8. Response.Write(MessageToPrint);
9. }
10. 
    

See the above example in that we have created one created once function PrintMessage which will print message on web page thorough Response.Write. And in the Page_Load event we called two times first one is which without argument which will print default message and another one which will have message an message argument which will print message which we have passed. Lets run that application and following out put will produced.

So that's it it will work like this if you passed argument the it will use argument or otherwise its will use the default argument. This will become handy and you don't need to write overloaded function with default value.

Happy Programming ...

Technorati Tags: C#4.0,ASP.NET 4.0,New Features

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New publish setting dialog in visual studio 2010 beta 2.

Those who are working with asp.net will also know about the publishing site to directly with publish dialog. This was introduced with visual studio 2005 and till now it is one of the best way to publish your asp.net site with only required files. Visual studio 2010 is not a exception but the publish dialog is enhanced with more feature. Now the its directly given in the toolbar of visual studio 2010 like following.

Once you select the new the following dialog will appear.

In visual studio 2010 publish setting dialog has more options then earlier version. Now you can also save publish profile also and this profile will appear in the publish setting and by choosing that you can directly publish your site from the publish button with same setting you set for this profile.

The publish setting dialog also has more options then earlier version of visual studio. It is having four option.

1. MSDeploy Publish
2. Ftp
3. FileSystem
4. FPSE

MSDeploy Publish:

With this option you can directly deploy your site on Remote server IIS with MSDeploy tool .This is one of coolest thing in click once deployment. It can also deploy all the IIS setting, content of the website,registry setting for website,required assembly etc. For more details about this please visit following link:

http://vishaljoshi.blogspot.com/2009/02/web-deployment-with-vs-2010-and-iis.html

FTP:

This is the same as visual studio 2008. You can directly publish your site on remote server with ftp protocol. If you have the username and password for ftp protocol then it is the easiest thing to publish your site on remote server.

File System:

This will create a published version of your webaplication on folder which you specified and then you can copy it whatever location you want. If you are having VPN of remote server then you can directly copy the publish version of you web application directly on specified location

FPSE:

FPSE means front page server extension.This is the oldest one which were introduced with the Internet was fairly young, to support things like hit counters, email components. Some developers that develop with FrontPage use these. It also provide way to publish content.

Technorati Tags: VisualStudio2010,Publish,Visual Web Developer 2010,ASP.NET

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Visual Studio 2010 New Features:Zooming and highlighting tags.

As i am using visual studio 2010 more and more i loving it more. While working with new Microsoft New Visual Studio 2010 Express edition I have came across about two more cool features zooming feature and another the highlighting start and end tag of particular selected tag.

Let see one by one. First feature is the new zooming feature of visual studio 2010 now you can zoom your html and server side code up to 20% to 400%. This feature is very useful when you are teaching some one some thing with your code. Another thing you can also make visible your lots of code in one screen while you set it less then 100%. There is a dropdown given in both source view of html code from which you can zoom it up to 400% like as following.

So you can zoom your code and view in the bigger way like following.

Same way you can do it for the server side code also.

Another feature i have came across is the highlighting of start and end tag in html source view. So user can have idea where the tag can be finish. As you can see in following picture I have selected link button and its highlighting both start and end tag of link button.

Technorati Tags: VisualStudio2010,ASP.NET 4.0

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page_load event firing twice in firefox with asp.net page or user control.

Technorati Tags: ASP.NET,C#.NET,ViewState

We are having a very large project in asp.net 3.5. During code review of project we have found that page_load event of one control is firing twice in the firefox browser. After doing some debugging i have found that it's due to one of the link button which is there in the control. I like to share you the same scenario with you all guys.

One of the developer from us has specified the link button click event  two times.  The first one in directly in the html with onclick  like following.

Code Snippet

1. <form id="form1" runat="server">
2.     <div>
3.         <asp:LinkButton ID="lnkButton" runat="server" onclick="lnkButton_Click"></asp:LinkButton>
4.     </div>
5.     </form>

And another in the initialize event he has also attached the event handler for the click event like following.

Code Snippet

1. protected override void OnInit(EventArgs e)
2.         {
3.             lnkButton.Click += new EventHandler(lnkButton_Click);    
4.             base.OnInit(e);
5.         }

So i have removed one of them from initialize event and now its calling page_load event only one time. This is also responsible for the failed to load ViewState error some time when you are adding controls dynamically.

Happy programming...

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File upload control is not working with Update panel

We all are using update panel for the Ajax implementation in every site. Nowadays Ajax is almost there in each and every site. Update panel is working fine with the all other controls but when we use the file upload control then its not working fine. I have searched from lots for this and i have found one of simple solution from the Imran's blog. It is so simple and works very well. You just need to add the "multipart/form-data" attribute to the form.

Here is the link from which you can have all the information.

http://knowledgebaseworld.blogspot.com/2009/02/file-upload-not-working-with-update.html

Thanks Imran for posting nice info like this.

Technorati Tags: Updatepanel,Microsoft Ajax,ASP.NET

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Review of Microsoft Visual Web Developer 2010 beta 2 express edition.

Microsoft visual studio express editions are light weight IDE provided free by Microsoft and also having almost all the functionality of its big brother Microsoft Visual Studio Professional edition except few. My pc is bit old now Its P4 and its having only 1gigs of ram so the express edition are the best suited for pc like mine. Microsoft has recently provided the beta 2 version of Microsoft new generation IDE called Visual Studio Twenty Ten(2010).

There are lots of changes from visual studio 2008 express edition and Microsoft Visual Studio 2010 Express edition. The first changes you will notice is the brand new splash screen and brand new colored logo for visual studio.

Another thing you will notice is the look and fill of IDE. It all looks like blue every where. Its is best suited for the Microsoft forthcoming operating system Microsoft Windows 7.

Another the difference is the create new project window which is bit stylish and having more options compare the to the visual studio 2008. There are two new things in new project dialog the first one the windows azure tools which is Microsoft's new steps towards the could computing(I will blog about this later one). and another thing is the Silver light application option. Now you can create three kind of application with the Microsoft SilverLight Application

1. Silverlight Application
2. Silverlight Navigation Application
3. Silverlight class library

Another difference is the default font for the IDE earlier it was Courier New and now its Consolas which is the next generation programming font. Which is more visual than the other fonts.

Another major difference is when you create a asp.net web application then its now having more default folders compare to visual studio 2008. There are site.master is also there and some default style sheet just like asp.net mvc applications. You will have default login control like asp.net mvc application. There are two more folder scripts and styles. In style you will have default style sheet for the application. Another folder is for the scripts which are having default JQuery as per earlier announcement Microsoft and JQuery will go together.

Another new things in Microsoft Visual Studio 2010 Visual Web Developer Expression edition is the Tool Setting menu which are having three setting by default.

1. Basic Settings
2. Code Optimized
3. Expert Settings.

All the three option will have different setting for solution explorer and all other stuff. Another new thing is visual web developer 2010 express edition having multi monitor support which is not there in earlier express editions.Visual web developer express also having windows presentation foundation code editor.

Another cool feature is the maximized windows in design view now you will have whole window is maximized in design view hiding other windows. So you visually look all the control more better. Another cool thing is the percentage dropdown through which you can set all screen by percentage as per your requirement.

There are lots of more features like Improved css compatibility,HTML and Javascript snippets,support for asp.net mvc application and support for multi target etc. I will blog about each feature in much more detail. T

If you still not downloaded the future version of visual studio express edition 2010 then you can download it from the following link.

http://www.microsoft.com/express/future/default.aspx

Technorati Tags: Microsoft Visual Web Developer Express Edition 2010,ASP.NET 4.0,Microsoft Express edition

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