ListView error in class library dll. Please help

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I am making dll file and for this pupose i created class library project and added class ListView
In my class library project listview properties are showing. Below code works in class in windows form project but same code does not work in class library project.
I am using below code into class library

VB.NET

Imports System.Windows.Forms
Imports System.Data.SqlClient
Public Class ListView
    Public Shared Function FillListView(ByVal lvw As ListView, ByVal dt As DataTable)
        lvw.view = View.Details
        lvw.GridLines = True
        lvw.FullRowSelect = True
        lvw.Columns.Clear()
        lvw.Items.Clear()
     End Function
End Class

In this code following lines giving error.It says view is not a member of DbLib.ListView and it says same about Gridlines, FullRowSelect, Columns.Items etc.

VB.NET

lvw.view = View.Details
lvw.GridLines = True
lvw.FullRowSelect = True
lvw.Columns.Clear()
lvw.Items.Clear()

I hope for help and guidence. Please help me.

Posted 2-Dec-15 22:43pm

Rizwan Chattha

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phil.o · Answer 1 · 2015-12-02T22:49:00

Solution 1

You should not name your class ListView, because there already is such a class defined in System.Windows.Forms namespace.

Better do:

C#

using System.Windows.Forms;

public class MyListView : ListView
{
   // ...
}

This way you will inherit tthe base ListView class, and be able to use all its existent properties and methods.

Posted 2-Dec-15 22:49pm

phil.o

v2

Comments

Rizwan Chattha 3-Dec-15 5:05am

I changed name to LView but same error still exist.

phil.o 3-Dec-15 5:25am

Because C# is case-sensitive, and you should write View instead of view. And set your class as inheriting ListView.

Rizwan Chattha 3-Dec-15 5:29am

I am using vb.net. and how to set class inheriting ListView.

Rizwan Chattha 3-Dec-15 5:43am

This code works "Inherits System.Windows.Forms.ListView"
but now new error showing. This line has error "For Each col As DataColumn In dt.Columns"
here dt.Columns
Public Shared Function FillListView(ByVal lvw As LView, ByVal dt As DataTable)
For Each col As DataColumn In dt.Columns
lvw.Columns.Add(col.ToString)
Next
End Function

In above code dt.Columns giving error. It says "Column is not member of DbLib.DataTable.
I tried to inherit it by using below line code
"Inherits System.Windows.Forms.DataTable"
but this line also giving error "Inherits can appear only one in class statemen and can specify only one class".

Rizwan Chattha 3-Dec-15 5:33am

This code works into class in case of windows form project. But it is not working only in case of class library project because i want to create dll file.

phil.o 3-Dec-15 5:59am

The only thing I can say now is that you should at least have a basic course or tutorial on the basis of .NET development, as the questions you are asking and the problems you are referring to concern several fields of development.
Please don't be an help-vampire, and try at least to study the basis of the tools you are using.

Rizwan Chattha 3-Dec-15 6:30am

Don,t care about childish questions. Questions is best way to learn. I think here we are missunderstanding some points. I am trying to create dll file in class library project to use dll file in other projects to save time instead of writing code again and again.

phil.o 3-Dec-15 6:48am

Yes, I got that point :) My concern is, you keep getting different error types, each being independent from the others; which makes me think you just copy-paste the code that is given to you without trying to understand yourself the errors you are getting.
You may improve your question with your actual code to get some further help. Please, also try to understand the errors that you encounter; you will learn much more in doing that, instead of posting them here as soon as they appear.
No pun intended, I'm trying to 'teach you how to fish' instead of 'giving you a fish', if you see what I mean.

Rizwan Chattha 3-Dec-15 6:52am

Yeah i understand what you mean. It is better to teach how to fix than giving fix. and this code is written by me but wasting too much time on this problem i am looking this problem with each angle. In hard situations some time minds does not work properly. This is my current situation at spot. I hope you can imagine like this type of situation.

Rizwan Chattha 3-Dec-15 6:45am

"Inherits System.Windows.Forms.DataTable" using this line icon of my class is changed in solution explorer.