Arnold Sia's .NET Blog: 2012

Wednesday, October 10, 2012

How to manipulate back button in ASP.NET 4?

After searching a lot of references. I have came to a conclusion that you can only prevent user from accessing the previous page is thru javascript window history. You can not manipulate the forward button but only the back button. There are many ways to do it, if you really want to manipulate both button is to clear cache like this,
Response.Buffer = true;
Response.ExpiresAbsolute = DateTime.Now.AddDays(-1);
Response.Expires = 0;
Response.CacheControl = “no-cache”;

To manipulate the previous page (back button) is thru this way,

<script type="text/javascript" language="javascript">
function DeleteHistory() {
window.history.go('Default.aspx');
}
setTimeout("DeleteHistory()", 1000);
window.onunload = function () { DeleteHistory(); };
</script>

Here are references that I have used:
Reference 1
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Reference 6
Reference 7
Reference 8
Reference 9
Reference 10
Reference 11

Javascript back button asp.net
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Reference 17
Reference 18
Reference 19

Thursday, August 23, 2012

Microsoft Product End of Support Date

Windows Lifecycle Fact Sheet
Windows OS Product
Visual Studio Lifecycle Fact Sheet
Visual Studio Product
SQL Server Lifecycle Fact Sheet
SQL Server Product

Tuesday, May 8, 2012

Optimize performance of your Entity Framework 4 on Client Side

If you want to improve the perforamance of your entity framework in client side, you can use Cache from
System.Web.Caching.Cache object. If you like to reset values,
Cache.Remove("Name of your Cache");
If you wish to store the value to a cache,
if (Cache.Get("Name of your Cache") == null)
Cache.Insert("Name of your Cache", object);
Where your object can be dataset or datatable or list.
You can determine which part of your code that needs to refactor your existing code using Entity Framework Profiler.
Entity Framework Profiler
Reference 1
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Reference 14

Thursday, April 12, 2012

Troubleshooting your rdlc inside Visual Studio 2010.

In order to troubleshoot your rdlc inside Visual Studio 2010.
Problem: how to make table invisible when there is no row.

Solution: Set the expression for the row,
=IIF(Fields!BILLER.Value is nothing, true, false)
Step 1: Right click the tablix, choose and click row visibility.
Step 2: Choose and click the button beside “Show or hide based on an expression”.
Step 3: Enter the expression, =IIF(Fields!BILLER.Value is nothing, true, false).

Problem 2: How to display the image inside the report viewer.

Solution: You need to set the UI culture and culture for an individual page, set the Culture and UICulture attributes of the @ Page directive, as shown in the following example:
<%@ Page UICulture="es" Culture="es-MX" %>
To insert image on the report itself.
Step 1: Right click and choose insert then choose and click on image.
Step 2: Click on import button.
Step 3: Choose and click on the image.

Problem 3: How to create a variable that will make computations, like quantity multiply price equals sales.

Solution:
Step 1: Find and Click on Report Properties.
Step 2: Find and click onVariables.
Step 3: Click Add Button.
Step 4: Enter your chosen name. Then click on “fx” button.
Step 5: Enter your expression after the equal sign.

References used:
Reference 1
Reference 2
References 3
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Reference 5
Reference 6
Reference 7
Reference 8
Reference 9
Note: I will include the images in this post next time.

Saturday, April 7, 2012

Useful links for SQL Server 2008 and Visual Studio 2010 Service Pack