Fetching member data from the DL within the OU - .NET (Core and Framework) Discussion Boards

That's one hell of an ambitious undertaking. Good luck, and we'll see you back here in 3 years when you've finished the basics.

Deja View - the feeling that you've seen this post before.

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Pete O'Hanlon wrote:
That's one hell of an ambitious undertaking

Yes, it is.

Pete O'Hanlon wrote:
we'll see you back here in 3 years when you've finished the basics.

Yes, and whatever "neat" functionality he puts into it, will probably be so last year Roll eyes | :rolleyes:

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

There's entire teams of people out there who devoted YEARS of their lives comming up with Mozilla and FireFox, and you want to create your own?? Does that fact tell you anything about how long it's going to take a single person to do??

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Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Dave Kreskowiak wrote:
devoted YEARS of their lives comming up with Mozilla and FireFox, and you want to create your own?? Does that fact tell you anything about how long it's going to take a single person to do??

Shhhhhhh. Don't burst his bubble Roll eyes | :rolleyes:

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

Good luck, you're going to need it.

"The clue train passed his station without stopping." - John Simmons / outlaw programmer

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham

rio_p wrote:
I want to create a new web browser without using windows component!

Yeah! And you could call it something like..."Chrome"!

Oh wait...d*mmit!!

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

rio_p wrote:
any one know how to create the web browser basicly?

Brainstorm and research and you shall get it!

But rather join the Mozilla team and code modules for Firefox. That way you will have a greater understanding of browser concepts than having us tell you some random thoughts on browser design.

And your friends will see you in much better books if you tell them you belong to Firefox dev team rather than ABCBrowse (or whatever name you thought for it) dev team Wink | ;)

-------------------------------------------
It's code that drives you - Shyam

Hi,

I have a requirement where in we need to fetch the member details within a DL. The DL resides within a Organizational Unit (OU). The DL name is DistributionList1 & OU name is Container1

I have written the below code to fetch the list of members to get individual member details & add it to my Member collection object

public void GetDLMembers() 

{ 

string _displayName; 

string _givenName; 

string _mail; 

DirectorySearcher search; 

DirectoryEntry entry; 

ArrayList listOfMatchingItems = new ArrayList(); 

entry = new DirectoryEntry("LDAP://my.domain.com/CN=DistributionList1,OU=Container1,DC=my,DC=domain,DC=com"); 

entry.AuthenticationType = AuthenticationTypes.Secure; 

search = new DirectorySearcher(entry); 

search.PropertiesToLoad.Add("mail"); 

search.PropertiesToLoad.Add("givenName"); 

search.PropertiesToLoad.Add("displayName"); 

string _Name; 

SearchResultCollection searchResults = search.FindAll(); 

foreach (SearchResult result in searchResults) 

{ 

foreach (String objName in result.GetDirectoryEntry().Properties["member"]) 

{ 

int selIndex = objName.IndexOf("CN=") + 3; 

int selEnd = objName.IndexOf(",OU") - 3; 

_Name = objName.Substring(selIndex, selEnd).Replace("\\", ""); 

DirectorySearcher dsSearch = new DirectorySearcher(entry); 

dsSearch.Filter = "CN=" + _Name; 

SearchResultCollection searchResults1 = dsSearch.FindAll(); 

foreach (SearchResult rs in searchResults1) 

{ 

_displayName = rs.Properties["displayName"][0].ToString(); 

_givenName = rs.Properties["givenName"][0].ToString(); 

_mail = rs.Properties["mail"][0].ToString(); 

... 

Logic to add it to the my customised collection object 

} 

} 

} 

}

For some reason the searchResults1 count is 0. Where its expected that the count for the searchResults1 collection should be 1. It will fetch the data of an account based on the CN. Any idea whats wrong in the code? Is there some thing wrong with the LDAP Path? Is there any better approach for accomplishing the functionality? If yes then any pointers to this will be very helpful.

Regards,
Vipul Mehta

Hi This is febin,

I have an C#.net project, I cannot able to run the application because I am getting the below error,

An unhandled exception of type 'System.Security.Policy.PolicyException' occurred in Unknown Module.

Additional information: Required permissions cannot be acquired

Please guide me to proceed,

Thanks in Advance

-

Have you tried running the application as an Administrator. (In vista it is not enough to run with the account as an administrator. You need to adjust the app for UAC prompts to elevate the process to administrative rights.

Regards,
Thomas Stockwell

Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

Visit my Blog

Hi
I am trying to modify class instance members using reflection. I am having problem when trying to add/remove/display elements related to List<int> member.

Following is the code.

[CODE]

    class TestClass
    {
        public int i = 0;

        public int IValue
        {
            get
            {
                return i;
            }
            set
            {
                i = value;
            }

        }
        public List<int> m_intList = new List<int>();
    }
    class Program
    {
        static void Main(string[] args)
        {
            TestClass tcObject = new TestClass();
            tcObject.i = 1;
            tcObject.m_intList.Add(1);
            tcObject.m_intList.Add(2);

            // Following code modifies the field "I".
            {
                FieldInfo fieldInfo = tcObject.GetType().
                                        GetField(
                                        "i",
                                        BindingFlags.Static |
                                        BindingFlags.Instance |
                                        BindingFlags.NonPublic |
                                        BindingFlags.Public);

                fieldInfo.SetValue(tcObject, 2);

                System.Console.WriteLine("I value '{0}'", fieldInfo.GetValue(tcObject));
            }

            // Following code modifies the IValue property.
            {
                PropertyInfo propertyInfo = tcObject.GetType().
                                        GetProperty(
                                        "IValue",
                                        BindingFlags.Static |
                                    BindingFlags.Instance |
                                    BindingFlags.NonPublic |
                                    BindingFlags.Public);

                MethodInfo propertySetMethodInfo =
                                propertyInfo.GetSetMethod(true);

                propertySetMethodInfo.Invoke(tcObject, new Object[] { 3 });

                System.Console.WriteLine("Property IValue '{0}'", tcObject.i);
            }

            // Following is the actual problem I am having. I would like to add
            // elements to the List member m_intList.
            {
                FieldInfo fieldInfo = tcObject.GetType().
                                        GetField(
                                        "m_intList",
                                        BindingFlags.Static |
                                        BindingFlags.Instance |
                                        BindingFlags.NonPublic |
                                        BindingFlags.Public);

                // HOW do I add elements to m_intList using the fieldInfo object.
                // I am trying to use reflection to modify values for the members.

// In my actual application I do not know the type i.e. whether it is List<int> or List<string> etc

// I will just have the tcObject. From the tcOBject I will get FieldInfo object corresponding to m_intList. Using this FieldINfo, // I should be able to add or remove elements.
                foreach (int intItem in tcObject.m_intList)
                {
                    System.Console.WriteLine("List Item value '{0}'", intItem);
                }
            }
        }
    }
</string></int></int></int>

[/CODE]

Thanks
Chandra

modified on Thursday, October 16, 2008 1:56 AM

At compile time I do not know whether the type is List<int> or List<string>. At runtime I should interpret it from the fieldInfo.FieldType.

I even tried the following code

MethodInfo addMethodInfo = fieldInfo.FieldType.GetMethod("Add");
object[] intValue = { 5 };
addMethodInfo.Invoke(tcObject, new Object[] { 5 });

But the above code gives me error "Unhandled Exception: System.Reflection.TargetException: Object does not match target type." when executing the "invoke"

chandrap wrote:
I am trying to modify class instance members using reflection.

Why?

led mike

Its a requirement in my application. Given an instance of class and values for the members, we should be able to update the members with the corresponding values.

chandrap wrote:
Given an instance of class and values for the members, we should be able to update the members with the corresponding values.

Where in there is the requirement to use Reflection?

led mike

Hello everyone, thanks for your help. I was able to find the solution for my requirement. Following is the code

    class ListElement
    {
        public ListElement()
        {
            m_element = 0;
        }

        public ListElement(int element)
        {
            m_element = 1;
        }

        public int m_element;
    }

    class TestClass
    {
        public int i = 0;

        public int IValue
        {
            get
            {
                return i;
            }
            set
            {
                i = value;
            }

        }
        public List<int> m_intList = new List<int>();
        public List<listelement> m_lstElement = new List<listelement>();
    }
    class Program
    {
        static void Main(string[] args)
        {
            TestClass tcObject = new TestClass();
            tcObject.i = 1;
            tcObject.m_intList.Add(1);
            tcObject.m_intList.Add(2);
            tcObject.m_lstElement.Add(new ListElement(1));

            // Following code modifies the field "I".
            {
                FieldInfo fieldInfo = tcObject.GetType().
                                        GetField(
                                        "i",
                                        BindingFlags.Static |
                                        BindingFlags.Instance |
                                        BindingFlags.NonPublic |
                                        BindingFlags.Public);

                fieldInfo.SetValue(tcObject, 2);

                System.Console.WriteLine("I value '{0}'", fieldInfo.GetValue(tcObject));
            }

            // Following code modifies the IValue property.
            {
                PropertyInfo propertyInfo = tcObject.GetType().
                                        GetProperty(
                                        "IValue",
                                        BindingFlags.Static |
                                    BindingFlags.Instance |
                                    BindingFlags.NonPublic |
                                    BindingFlags.Public);

                MethodInfo propertySetMethodInfo =
                                propertyInfo.GetSetMethod(true);

                propertySetMethodInfo.Invoke(tcObject, new Object[] { 3 });

                System.Console.WriteLine("Property IValue '{0}'", tcObject.i);
            }

            {
                FieldInfo fieldInfo = tcObject.GetType().
                                        GetField(
                                        "m_intList",
                                        BindingFlags.Static |
                                        BindingFlags.Instance |
                                        BindingFlags.NonPublic |
                                        BindingFlags.Public);

                MemberInfo[] listMemberInfoArray = tcObject.GetType().GetMember("m_intList");
                MemberInfo listMemberInfo = listMemberInfoArray[0];
                MethodInfo addMethodInfo = fieldInfo.FieldType.GetMethod("Add");
                object[] elementValue = { 5 };
                addMethodInfo.Invoke(fieldInfo.GetValue(tcObject), elementValue);

                foreach(int currElement in tcObject.m_intList)
                {
                    System.Console.WriteLine("INt List element {0}", currElement);
                }

                Console.WriteLine();
            }

            {
                FieldInfo fieldInfo = tcObject.GetType().
                                        GetField(
                                        "m_lstElement",
                                        BindingFlags.Static |
                                        BindingFlags.Instance |
                                        BindingFlags.NonPublic |
                                        BindingFlags.Public);

                MethodInfo addMethodInfo = fieldInfo.FieldType.GetMethod("Add");
                Object listElementObject = Activator.CreateInstance(fieldInfo.
                                                            FieldType.
                                                            GetGenericArguments()[0]);

                FieldInfo listElementFieldInfo = listElementObject.GetType().
                                        GetField(
                                        "m_element",
                                        BindingFlags.Static |
                                        BindingFlags.Instance |
                                        BindingFlags.NonPublic |
                                        BindingFlags.Public);

                listElementFieldInfo.SetValue(listElementObject, 2);

                object[] elementValue = { listElementObject };
                addMethodInfo.Invoke(fieldInfo.GetValue(tcObject), elementValue);


                foreach (ListElement currListElement in tcObject.m_lstElement)
                {
                    System.Console.WriteLine("List Item value '{0}'", currListElement.m_element);
                }
            }

        }
    }
</listelement></listelement></int></int>

Hello,
This might be an easy question! But I was wondering if there is any library in .net for simulation?
If I want to simulate a Network of a few computer nodes in C#, what is the best way?

Thanks a lot for your help. Smile | :)

Sareh khanoom wrote:
But I was wondering if there is any library in .net for simulation

Nope. This would have to be provided by you or some other third party library.

Sareh khanoom wrote:
If I want to simulate a Network of a few computer nodes in C#, what is the best way?

That's determined by your simulation requirements. You'll have to limit this by asking yourself "What aspects of a network are am I going to simulate and for what purpose?"

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

I have a database which has a unique primary key defined key on two columns, in the example below the columns are type and data.

type	value	data
9	0	'ABC'
9	0	'ABC '

When I read in a datatable and then set the PrimaryKey collection with the designated columns I get an exception saying that 'These columns don't currently have unique values'.

So, to me it appears that ADO is ignoring the spaces with respect to determining uniqueness (although the whitespace appears in the rows collection).

I started looking into the DataTable and DataColumn object to see if there was anything that jumped out, but nothing so far.

Can anyone confirm this behavior and/or offer any assistance?

Thanks!

calhuskerfan wrote:
I have a database

calhuskerfan wrote:
So, to me it appears that ADO is

ADO is NOT a database. If you are setting up the keys and constraints in the database it is the database product that will contain your answer not ADO.

led mike

The constraints in the database are fine. They allow the described scenario where 'ABC' and 'ABC ' are considered unique.

When I read, with ADO, from the database into a datatable object ADO does not bring along the primary key identified in the database. So it allows at this point the two above rows to exist.

When I set the PrimaryKey property on the DataTable object (after the rows have been read) to include the column containing the above data I get the constraint exception.

Edit - The exception is actually an ArgumentException stating that the values are not unique.

calhuskerfan wrote:
The constraints in the database are fine. They allow the described scenario where 'ABC' and 'ABC ' are considered unique.

What database are you using? I cannot reproduce that behavior using SQL Express 2005.

led mike

Sybase SQL Anywhere 10.

Thanks.

Here is a very quick (and sloppy) example that reproduces the behavior.

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Data;


namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            Test1();
        }

        public static void Test1()
        {
            DataTable dt1 = new DataTable();
            //
            dt1.Columns.Add("col0");
            dt1.Columns.Add("col1");
            dt1.Columns.Add("col2");
            //
            dt1.Columns[0].DataType = typeof(Int32);
            dt1.Columns[1].DataType = typeof(String);
            dt1.Columns[2].DataType = typeof(String);
            //
            DataRow dr = dt1.NewRow();
            dr["col0"] = 1;
            dr["col1"] = "Column 2";
            dr["col2"] = "Column 3";
            dt1.Rows.Add(dr);
            //
            dr = dt1.NewRow();
            dr["col0"] = 1;
            dr["col1"] = "Column 2";
            dr["col2"] = "Column 3   ";
            dt1.Rows.Add(dr);
            //
            try
            {
                dt1.PrimaryKey = new DataColumn[] { dt1.Columns[0], dt1.Columns[2] };
            }
            catch (ArgumentException ae)
            {
                MessageBox.Show(ae.Message);
            }
        }
    }
}