.NET (Core and Framework)

3-Jul-07 9:42

I have a set of class all deriving from the same interface, iVendor. Now I have a user control that I am formatting according to the type of VendorClass that it will be assigned via a property. The problem is the following: My middle tier is returning a generic Collection that is returned from a generic function. So my function signature is as follows:

public static Collection<t> GetVendors<t>(eDataDetail eDetail, int Contract_ID, ref ContractsException oCEExecption,
int startRowIndex, int maximumRows, out int TotalRowCount) where T : iVendor, new()

I'm trying to assign the result of this function call to a property on my usercontrol with a signature of :

public List<ivendor> Vendors
{

get { return this._oLVendors; }set { this._oLVendors = value; }
}

I'm trying to make the assignment as follows:

ctlDemographics.Vendors = new List<ivendor>(Contract.GetVendors<contractvendor>(Contract.eDataDetail.Basic, this.ContractID, ref oCE, 1, 300, out TotRowCount));

SInce there is no such thing as Generic properties can someone explain how I would go about handling this?

Thanks

Regards,
Santiago "Saint" Perez

Florida's Turnpike Enterprise - Santiago.perez@dot.state.fl.us

Andy L 23-Jul-07 10:21

Andy L 2

3-Jul-07 10:21

Hi Santiago,

You could do this;

class MyClass<t>
{
private List<T> _list = null;
public List<T> Prop1
{
get { return _list; }
set {_list = value; }
}

or if you have a known base class or interface of the types to be stored on the List
you can do this:

public interface iInterface{}
class MyClassA:iInterface{}
class MyClassB:MyClassA{}
class MyClassC:MyClassB{}

class MyClassD
{

private List<iInterface> _list = null;

public List<iInterface> Prop1
{
get { return _list; }
set {_list = value; }
}

Andy

Santiago Perez3-Jul-07 15:00

3-Jul-07 15:00

Using your example I have :

using SCG = System.Collections.Generic;

SCG.List oColl = new SCG.List();
oColl.Add(new B("Michelle"));
oColl.Add(new B("Chris"));
oColl.Add(new B("kathy"));
this.Prop = new SCG.List<iclass>(oColl);

public SCG.List<iclass> Prop
{
get { return new SCG.List<iclass>(); }
set { }
}

I get an error on line:
this.Prop = new SCG.List<iclass>(oColl);

Error is:
Error 1 The best overloaded method match for 'System.Collections.Generic.List<webapplication1.iclass>.List(int)' has some invalid arguments C:\Projects\ConsoleApplication1\WebApplication1\Default.aspx.cs 26 25 WebApplication1

Regards,
Santiago "Saint" Perez
Florida's Turnpike Enterprise - Santiago.perez@dot.state.fl.us

Andy L 29-Jul-07 1:47

Andy L 2

9-Jul-07 1:47

This error could be because of a type mismatch - but since the type used for list is not given in your examples it's impossible to tell.

Andy

Santiago Perez3-Jul-07 18:26

3-Jul-07 18:26

I think I found the solution: COnvertAll method of the COllectionBase Collections.

//Collection to list
SCG.List oColl = new SCG.List();
oColl.Add(new B("Michelle"));
oColl.Add(new B("Chris"));
oColl.Add(new B("kathy"));
SCG.List<iclass> ListA = oColl.ConvertAll<iclass>(new Converter<b,iclass>(ConverttoIClass));

public static iClass ConverttoIClass(iClass obj)
{
return (obj as iClass);
}

Regards,
Santiago "Saint" Perez
Florida's Turnpike Enterprise - Santiago.perez@dot.state.fl.us

Santiago Perez9-Jul-07 3:50

System.byte[] returned for AD Query (asp.net/C# web app)

9-Jul-07 3:50

FOund the solution using PowerCollections Algorithms class:
ctlDemographics.Vendors = new List<ivendor>(Algorithms.Convert<contractvendor, ivendor="">(Contract.GetVendors<contractvendor>(Contract.eDataDetail.Basic, this.ContractID, ref oCE, 1, 300, out TotRowCount), Vendor.ConverttoiVendor));

Had to create a Convert Delegate, very simply:

public static iVendor ConverttoiVendor(iVendor oV)
{
return (oV as iVendor);
}

THen just pass that to the constructor of a new generic List<>.

Regards,
Santiago "Saint" Perez

Florida's Turnpike Enterprise - Santiago.perez@dot.state.fl.us

Matt Martinez3-Jul-07 5:24

Matt Martinez

3-Jul-07 5:24

Hi All,

I am sure this has been answered somewhere, but I have scoured the web for a couple hours and seem to find the question being asked but never answered. My problem is simply this:

I have an LDAP query that simply pulls the groups out of Active Directory and adds them to listbox. The application works perfectly on my development box; however, when I take the application live as a website on a development server instead of groups being returned and added it only adds 1 line to the listbox, "System.byte[].

Here is what my code looks like, pretty basic directory searcher:

private void PullGroups(string DistinguishedName)
{

DirectorySearcher ds = new DirectorySearcher("mycompany's domain");
ds.PageSize = 0;
ds.SearchScope = SearchScope.Subtree;
ds.ReferralChasing = ReferralChasingOption.None;
ds.SizeLimit = 100000;

ds.Filter = "(&(objectClass=Group)(objectCategory=Group)(ManagedBy=" + DistginuishedName + "))";

SearchResultCollection src = ds.FindAll();

try
{
foreach (SearchResult searchResult in src)
{
string groupName = searchResult.Properties["sAMAccountName"][0].ToString();
lstGroups.Items.Add(groupName);

}
}
catch
{

}
}

Any help on this would be greatly appreciated. Thanks, Matt

Re: System.byte[] returned for AD Query (asp.net/C# web app)

Dave Kreskowiak3-Jul-07 5:47

Re: System.byte[] returned for AD Query (asp.net/C# web app)

3-Jul-07 5:47

It looks like the return type from the property is actually an array of bytes making up a Unicode string. Calling ToString on it will do exactly what you described as the problem. Try doing this to get the bytes converted to a string:

using System.Text
.
.
.
    string acctName = Encoding.Unicode.GetString(searchResult.Properties["sAMAccountName"][0]);

A guide to posting questions on CodeProject[^]

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

Matt Martinez3-Jul-07 6:35

Matt Martinez

3-Jul-07 6:35

Hi Dave, thanks for the response.

I tried the code you suggested, and it gives the errors

The best overloaded method match for 'System.Text.Encoding.GetString(byte[])' has some invalid arguments

and

cannot convert from 'object' to 'byte[]'

I am guessing that the property collection is of the object type. What perplexes me the most is that the group names are returned fine running from Visual Studio, but when I bring this to a webserver it gives me the byte array.

I'm going to continue to work with the encoding though, I think that is where the problem lies as you suggested.

Re: System.byte[] returned for AD Query (asp.net/C# web app)

Dave Kreskowiak3-Jul-07 7:03

Re: System.byte[] returned for AD Query (asp.net/C# web app)

3-Jul-07 7:03

You can cast the object to a byte array, then pass that to GetString.

A guide to posting questions on CodeProject[^]

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

Matt Martinez6-Jul-07 8:00

Matt Martinez

6-Jul-07 8:00

I was able to solve this one by removing impersonation as true in the web.config and using an impersonation context only in the method which determines what user is accessing the page, then removing the context after this information is passed into the methods working with the Active Directory.

Looks like it was an authentication issue. Hope this information helps anyone who has come across this problem.

How to search for hard coded string in VC++ code

Neeranjan3-Jul-07 3:46

Neeranjan

3-Jul-07 3:46

Hi,

I need to search for hard coded strings from the VC++ 6 / VC++.Net 2003 source code.
Is there any tool for this?
Is there any criteria to define the search for this?

Regards,
Neeranjan

Thanks & Regards,
Neeraj

Re: How to search for hard coded string in VC++ code

Dave Kreskowiak3-Jul-07 5:21

Re: How to search for hard coded string in VC++ code

3-Jul-07 5:21

Have you looked under the Edit menu? Perhaps "Find..." or "Quick Find..." would do what you want...

A guide to posting questions on CodeProject[^]

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

l0kke3-Jul-07 5:41

l0kke

3-Jul-07 5:41

I would say, anything what is between two '"' is 'hardcoded' string... so search for '"'.
Or maybe I don't understand what you need Smile | :)

Pilo

DO NOT CROSSPOST

leckey3-Jul-07 8:19

leckey

3-Jul-07 8:19

Please read the forum guidelines.

______________________
stuff + cats = awesome

The rules

leckey3-Jul-07 8:18

leckey

3-Jul-07 8:18

Please read the forum guidelines. Message titles should not include words like 'help' or 'urgent.' Please give your message titles meaning.

______________________
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Array name is in a variable

peacefulmember29-Jun-07 9:35

peacefulmember

29-Jun-07 9:35

I have some arrays declared as,

Dim upperCases() As String = {"ALPHA", "BETA", "GAMMA"}
Dim lowerCases() As String = {"alpha", "beta","gamma" }
...many more arrays

I need to read appropriate array based on the parameter passed to the function

Function getText(ByVal pos As Integer, ByVal arrayName As String) As String
'I want to do something like
Return arrayName(pos)
End Function

Could anybody help me please?

Re: Array name is in a variable

Dave Kreskowiak29-Jun-07 9:49

Re: Array name is in a variable

29-Jun-07 9:49

If you're looking at doing something like this, you most certainly don't need it. If your code is smart enough to pass in the correct array name and element number, it's smart enough to just do Dim str As String = upperCases(x) without going to a function to do it.

You cannot do what you want, how you to do it. It would take using Reflection methods to do something like this. It would also be a very expensive operation to return a value, so if performance is an issue, this isn't they way to do it.

You'd have to do something like this:

Public Function getText(ByVal pos As Integer, ByVal arrayName As String) As String
    Select Case arrayName
        Case "upperCases"
            Return upperCases(pos)

        Case "lowerCases"
            Return lowerCases(pos)

        Case Else
            Throw New ArgumentException("Invalid array name passed!")
    End Select
End Function

A guide to posting questions on CodeProject[^]

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

peacefulmember2-Jul-07 4:21

peacefulmember

2-Jul-07 4:21

Dave,
Thank you for reply.

When you say to do something like,
Dim str As String = upperCases(x)
That is what I am tring to do, which does not work.

To make sure that prog pass the correct array name I have created an Enum that has all the array names, which I access as

Enum AllArrays
EmployeeGrade
EmployeeDepartment
EmployeePrivileges
EmployeeSlab
EmployeeAgeGroup
End Enum

Dim arrNames As String() = System.Enum.GetNames(GetType(AllArrays))
Dim readArray As String = colorNames(AllArrays.EmployeeDepartment)

I get the correct array name to access in readArray.

Now, when I try to read it using readArray(0), It returns the first character of array name i.e. "E". readArray(1) returns "m" and so on. I understand it is happening because readArray is a type string, but is there a way to do what I want to do, other than using select case or If..Else.

Thanks again.

Re: Array name is in a variable

Dave Kreskowiak2-Jul-07 12:38

Collection<> to KeyedCollection<T,K>

2-Jul-07 12:38

peacefulmember wrote:
but is there a way to do what I want to do,

I already told you, no.

peacefulmember wrote:
other than using select case or If..Else.

The only other method is to use Reflection, but it's incredibly slow.

You really need to rethink this design. You're treating variable names as an integral part of the Data and Business Logic, which you should NEVER do, nor do you ever need to do it in a proper design.

You're combining functions that really should be seperated. You're needlessly trying to get a single function to return a value from a number of arrays when this is never necessary.

If you want functionality like this, put your data into DataTables.

A guide to posting questions on CodeProject[^]

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

Santiago Perez29-Jun-07 9:13