IT Mastering

NEW POST: .Net and DataGram

Jimmy_Ye — Tue, 21 Oct 2008 05:49:27 GMT

Hi All,

I would like to know about DataGram and .Net.

NEW POST: How to backup & restore site collection using stsadm command tool

mostafa_alshimi — Mon, 30 Jun 2008 21:28:09 GMT

Using stsadm you can backup & restore a site collection

To backup
Stsadm –o backup –url <SiteURL> -filename <FileName>

To restore
Stsadm –o restore –url <restoretoURL> -filename <filetorestorefrom>

NEW POST: How to know the requesting ip in asp.net and authenticate it

mostafa_alshimi — Tue, 20 May 2008 08:21:29 GMT

To know who is requesting your asp.net site you can know it from HttpRequest of current HttpContext

if(HttpContext.Current.Request.UserHostAddress=="http://192.129.2.1")
{
//Authenticated
}
else
{
//Not Authenticated
}

NEW POST: How to change the current identity in asp.net

mostafa_alshimi — Tue, 20 May 2008 08:18:16 GMT

To change the current identity(user) in asp.net ,here is a sample of code

System.Security.Principal.GenericIdentity id = new System.Security.Principal.GenericIdentity("Mustafa Refai");
System.Security.Principal.GenericPrincipal p = new System.Security.Principal.GenericPrincipal(id, new string[]Mustafa Refai", "MRefai);
HttpContext.Current.User = p;

NEW POST: How to Create Custom attribute

mostafa_alshimi — Tue, 20 May 2008 08:15:31 GMT

To create a custom attribute for classes , methods or properties you have to create a new class inheriting from System.Attribute
This is a sample for a custom attribute class

[AttributeUsageAttribute(AttributeTargets.All,AllowMultiple=true)]
public class Author:System.Attribute
{
public Author(string name)
{
this.Name = name;
}
public string Name { get; set; }
}

and you can then use it like this

public class ClassWithCustomAttribute
{
[Author("Mustafa Refai")]//here is the custom attribute
public string Property1
{ get; set; }
}

NEW POST: Change assigned to for workflow task outside the workflow

mostafa_alshimi — Sun, 04 May 2008 13:40:37 GMT

Unfortunally, AssignedTo field is a read only field so if you want to change the value of this field you have to do this work around

First, you have to update the task from the application and set a new field which will have the new value of assigned to like this

SPListItem item = taskList.Items[0];//Item task

//item["AssignedTo"]="Domain\UserName";//Will not work

Hashtable prop= new Hashtable();

prop["AssignedTo_UI"]="Domain\UserName";

SPWorkFlowTask.AlterTask(item,prop,true);

Then inside you workflow the OnTaskChanged even will fire, in this even handler you will have to check the value of this new field in the ExtendedProperties collection then take this value and set it to AssingedTo field which will be accepted because it is being updated inside the workflow it slef.

NEW POST: Simple Encryption and Decryption

mostafa_alshimi — Sun, 04 May 2008 13:32:59 GMT

protected string EncryptString(string eString)
{
Byte[] b = System.Text.ASCIIEncoding.ASCII.GetBytes(eString);
string es = Convert.ToBase64String(b);
return es;
}

protected string DecryptString(string dString)
{
Byte[] b = Convert.FromBase64String(dString);
string ds = System.Text.ASCIIEncoding.ASCII.GetString(b);
return ds;
}

NEW POST: Get List and Item of workflow task

mostafa_alshimi — Sun, 30 Mar 2008 12:30:13 GMT

To get item id of a workflow task

workflowItemID=(int)item["ows_WorkflowItemId"];//item is the SPListItem that represents the task

To get list guid of a workflow task

listGuid=new Guid(item["ows_WorkflowListId"].ToString());

NEW POST: Update workflow task from UI or external code

mostafa_alshimi — Sun, 30 Mar 2008 07:34:13 GMT

When you are about to change workflow task properties or update it outside the event of UpdateTask inside the workflow it will through exception that "Can not update the task because it is locked by a workflow", so to update a task from outside the workflow events you have to use AlterTask

SPList list = site.RootWeb.Lists["Workflow Tasks"];

SPListItem taskItem = list.GetItemById(int.Parse(Request.QueryString["TaskID"]));

Hashtable taskHash = new Hashtable();

taskHash["% Complete"] = 1;//if the key is one of the predefined properties then it will be set otherwise it will be inserted into the extented properties

SPWorkflowTask.AlterTask(taskItem, taskHash, true);

NEW POST: Using chaching in class library

mostafa_alshimi — Mon, 17 Mar 2008 12:17:40 GMT

It is common to use caching in ASP.Net forms, but what if you want to use it in class library?

You will have to add System.Web refrence and then use the caching like this

System.Web.HttpRuntime.Cache["ProductData"] = GetProductData();

NEW POST: Sharing data among controls using page context

mostafa_alshimi — Mon, 17 Mar 2008 11:51:49 GMT

It happens manytime that you have data fetched from the database from one control and you need to populate this data but on seperate controls on the same page, the most useful solution is to use Page.Context which is a collection shared between all controls on the same page

In one of the control you may have this

Context.Items["ProductData"] = GetProductData();

In other control you then get this value like this

DataSet ds = (DataSet)Context.Items["ProductData"];

CREATED RELEASE: Create a multi-language MOSS site (Mar 04, 2008)

Tue, 04 Mar 2008 17:51:18 GMT

It is becoming very common now to have site with more than one language, but it is little bit different in MOSS in the attached file a comprehensive explaining of how to create a multi - language sites

NEW POST: Get selected value from DropDownList using javascript

mostafa_alshimi — Wed, 06 Feb 2008 11:26:15 GMT

document.getElementById('<%= drpStatus.ClientID %>').value; where "drpStatus" is the ID of Server DropDownList

NEW POST: Access Local & Global resource from javascript

mostafa_alshimi — Wed, 06 Feb 2008 10:39:17 GMT

You can access the local and global resources from java script

alert('<%= GetLocalResourceObject("ListItemResource3.Text") %>');//"ListItemResource3.Text" is the key you want to get from the current local resource

alert('<%= GetGlobalResourceObject("westwindglobalization","Loading") %>');//"westwindglobalization" is the resource file name and "Loading" is the key

UPDATED WIKI: Home

mostafa_alshimi — Wed, 06 Feb 2008 09:32:17 GMT

IT Mastering
A place where you can find a lot of samples and solutions for common issues in dot net languages and famous Microsoft servers.

NEW POST: Change culture in aspx form

mostafa_alshimi — Tue, 05 Feb 2008 13:40:21 GMT

To change culture in aspx form you have to override InitializeCulture()

protected override void InitializeCulture()
{
this.Culture = "ar-SA";
this.UICulture = "ar-SA";
System.Threading.Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo("ar-SA");
System.Threading.Thread.CurrentThread.CurrentCulture = System.Globalization.CultureInfo.CreateSpecificCulture("ar-SA");

}