.NET (Core and Framework)

Re: Base element load twice in TreeView, please help.

26-Dec-08 2:40

Hello everybody,

This is my first post here and I am learning .NET so please excuse my baby steps.
I am trying to load the elements in tree view. My base item is loading two times. I know why it's loading but i don't know how to protect it or what's the other method so that base item will not load twice.

Thanks. Here is the code.

Private Sub LoadScenarios()

	For Each aScenarioBase As MmScenario In aDataSet()
		Dim baseScenarioTreeNode As TreeNode = Me.tvScenario.Nodes.Add(aScenarioBase.Id.ToString, aScenarioBase.Label)
		LoadScenariosAndChildren(aScenarioBase, baseScenarioTreeNode)
	Next

End Sub

Private Sub LoadScenariosAndChildren(ByVal aScenarioParent As MmScenario, ByVal parentScenarioTreeNode As TreeNode)
	Dim childScenarioTreeNode As TreeNode = parentScenarioTreeNode.Nodes.Add(aScenarioParent.Id.ToString, aScenarioParent.Label)

	For Each aScenario As IScenario In aScenarioParent.Children()
		LoadScenariosAndChildren(aScenario, childScenarioTreeNode)
	Next
End Sub

Results:
0000
0000
0001
0001.1
0002

I want:
0000
0001
0001.1
0002

Many Thanks.

Not Active26-Dec-08 3:09

Re: Base element load twice in TreeView, please help.

26-Dec-08 3:09

Have you debugged and stepped through your code? You'll learn a lot watching what happens.

only two letters away from being an asset

Musa Biralo26-Dec-08 3:21

Re: Base element load twice in TreeView, please help.

26-Dec-08 3:21

yes, i looked at every steps. I know why it's doing that but i don't know how to prevent that. Any help will be appreciated. Thanks.

Not Active26-Dec-08 3:45

Re: Base element load twice in TreeView, please help.

26-Dec-08 3:45

In LoadScenarios() you add the node to the tree then pass that node as the parent to LoadScenariosAndChildren where you immediately add the node again. Don't load the node in LoadScenarios().

only two letters away from being an asset

Musa Biralo26-Dec-08 4:15

Re: Base element load twice in TreeView, please help.

26-Dec-08 4:15

Exactly, I don't want to load the node in LoadScenarios() but without doing that i cannot pass the node. Is there way just to initialize?

what i am trying to do is to create the following structure in treeview:

---Base_0
-----Base_0_1
---Base_1
---Base_2
---Base_2_1
---Base_2_1_1
---Base_3

Thanks for your prompt response.

Musa Biralo26-Dec-08 4:18

Re: Base element load twice in TreeView, please help.

26-Dec-08 4:18

i mean this :

---Base_0
-----Base_0_1
---Base_1
---Base_2
-----Base_2_1
-------Base_2_1_1
---Base_3

Not Active26-Dec-08 4:59

Run .Net1.1 and 2.0 at same time

26-Dec-08 4:59

musabiralo wrote:
cannot pass the node

Pass a null then check for it. If the node is null, add to the root, if not add children

There are plenty of examples of how to recursively populate a tree, have you looked at any of them?

only two letters away from being an asset

datagridview using c#

kulandaivel_mca200726-Dec-08 0:08

kulandaivel_mca2007

26-Dec-08 0:08

i bind one table in my datagridview

i have 4 check box in my datagridview...

one for present...
second one for absent...
third one for morning present...
fourth one for evening present...

if i check only one check box i get the following error...

// ERROR // Object reference not set to an instance of an object.

bcz i assigned check box value to one string variable...

string value11 =”aa” , value22 =”aa” , value33 =”aa” , value44 =”aa” ;
con27.Open();
int rows = dataGridView1.Rows.Count;
rows = rows - 1;

for (int i = 0; i < rows; i++)
{
SqlCommand cmd27 = new SqlCommand("sp_update_att_lkg", con27);
cmd27.CommandType = CommandType.StoredProcedure;

value11 = dataGridView1.Rows[i].Cells[0].Value.ToString();
value22 = dataGridView1.Rows[i].Cells[1].Value.ToString();
value33 = dataGridView1.Rows[i].Cells[2].Value.ToString();
value44 = dataGridView1.Rows[i].Cells[3].Value.ToString();

string value10 = dataGridView1.Rows[i].Cells[4].Value.ToString();// S_ID
string value6 = dataGridView1.Rows[i].Cells[5].Value.ToString();// name
string value7 = dataGridView1.Rows[i].Cells[6].Value.ToString();// class
string value8 = dataGridView1.Rows[i].Cells[7].Value.ToString();//section
string value9 = dataGridView1.Rows[i].Cells[8].Value.ToString();// scode
string value5 = dataGridView1.Rows[i].Cells[9].Value.ToString();// uid
string dt1 = dateTimePicker1.Text;
DateTime DT = DateTime.Parse(dt1); // ATTENDANCE

if (value11 == "True")
{
value11 = "present";
}
else
{
value11 = "absent";
}

cmd27.Parameters.Add(new SqlParameter("@puid", SqlDbType.Int));
cmd27.Parameters["@puid"].Value = value5;

cmd27.Parameters.Add(new SqlParameter("@pname", SqlDbType.VarChar));
cmd27.Parameters["@pname"].Value = value6;

cmd27.Parameters.Add(new SqlParameter("@pclass", SqlDbType.VarChar));
cmd27.Parameters["@pclass"].Value = value7;

cmd27.Parameters.Add(new SqlParameter("@psection", SqlDbType.VarChar ));
cmd27.Parameters["@psection"].Value = value8;

cmd27.Parameters.Add(new SqlParameter("@pcode", SqlDbType.VarChar));
cmd27.Parameters["@pcode"].Value = value9;

cmd27.Parameters.Add(new SqlParameter("@pattend",SqlDbType.DateTime));
cmd27.Parameters["@pattendance"].Value = DT;

cmd27.Parameters.Add(new SqlParameter("@pstatus", SqlDbType.VarChar));
cmd27.Parameters["@pstatus"].Value = value11;

cmd27.Parameters.Add(new SqlParameter("@ps_id", SqlDbType.VarChar));
cmd27.Parameters["@ps_id"].Value = value10;

cmd27.ExecuteNonQuery();
}

expecting suggestions...

Vince.Ro25-Dec-08 17:30

25-Dec-08 17:30

There is a question about run dotnetframework1.1 application and dotnetframework2.0 application at the same time.
Is anybody tell me the solution for this? Thanks very much!

OS: Win2003 64bit

Brij25-Dec-08 17:58

Brij

25-Dec-08 17:58

If you have web application deployed on IIS,then every virtual directory should be mapped to corrrect version of ASP.NET ISAPI exetention.You can configure it by aspnet_regiis.exe.So every Virtual directory will run on 1.1,and for 2.0,you also need to register it,after registering it you'll get dropdown for ASP.NET version in the properties of your Virtual Directory and selecting ASP.NET tab.

Cheers!!
Brij

Vince.Ro25-Dec-08 18:50

25-Dec-08 18:50

The server's OS is Win2003 64bit
Installed dotnetframework1.1(32bit) and dotnetframework2.0(64bit).
There has no ASP.NET choose in IIS.

Abhijit Jana25-Dec-08 20:24

Abhijit Jana

25-Dec-08 20:24

lucasluo wrote:
There has no ASP.NET choose in IIS.

Its means you have installed IIS after .NET Framwork.

If you want this, From the command prompt , go to Framework Directory
e.g : c:\windows\microsoft.net\Framework\V2.05732

then run aspnet_regiis Command Blush | :O

cheers,
Abhijit

Vince.Ro25-Dec-08 22:42

25-Dec-08 22:42

I reinstall the .NET Framwork1.1(32bit) and .NET Framwork2.0(32bit) by aspnet_regiis.exe -i
But also have no the ASP.NET option.

Brij25-Dec-08 22:59

Brij

25-Dec-08 22:59

As you said,OS is 64 bit.So install the 64 bit framework,32 bit wont work

Cheers!!
Brij

Vince.Ro28-Dec-08 13:44

Interface and GetType() - works in C# but not in VB?

28-Dec-08 13:44

But The MS said that "Running 32-bit Applications on 64-bit Windows (IIS 6.0)"

URL:http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/13f991a5-45eb-496c-8618-2179c3753bb0.mspx?mfr=true[^]

David Hovey25-Dec-08 12:37

Re: Interface and GetType() - works in C# but not in VB?

25-Dec-08 12:37

Hi again. I have another question hopefully someone can help me with. I've found articles online where it is said that an Interface does not have a GetType() function as it is not derived from 'Object'. This seems true since when trying to work with the IDataObject interface, there is no GetType() function.

The problem is, as my last post addresses, I'm trying to change code from C# to VB for drag and dropping from Outlook. The original C# code is shown below. The very Odd thing I don't understand is how in C# GetType() works with IDataObject. Inside the DragDrop event of an Windows Form object e.Data.GetType() is usable, but this is not the case in VB.

I have the below code converted to VB but the New constructor does not work since there is no GetType() functions "visible."

Thanks again!!

private System.Windows.Forms.IDataObject underlyingDataObject;
private System.Runtime.InteropServices.ComTypes.IDataObject comUnderlyingDataObject;
private System.Windows.Forms.IDataObject oleUnderlyingDataObject;
private MethodInfo getDataFromHGLOBLALMethod;

public OutlookDataObject(System.Windows.Forms.IDataObject underlyingDataObject)
{
    //get the underlying dataobject and its ComType IDataObject interface to it
    this.underlyingDataObject = underlyingDataObject;
    this.comUnderlyingDataObject = (System.Runtime.InteropServices.ComTypes.IDataObject)this.underlyingDataObject;

    //get the internal ole dataobject and its GetDataFromHGLOBLAL so it can be called later
    FieldInfo innerDataField = this.underlyingDataObject.GetType().GetField("innerData", BindingFlags.NonPublic | BindingFlags.Instance);
    this.oleUnderlyingDataObject = (System.Windows.Forms.IDataObject)innerDataField.GetValue(this.underlyingDataObject);
    this.getDataFromHGLOBLALMethod = this.oleUnderlyingDataObject.GetType().GetMethod("GetDataFromHGLOBLAL", BindingFlags.NonPublic | BindingFlags.Instance);
}

cterrinw27-Sep-09 19:32

cterrinw

27-Sep-09 19:32

Hi David,

I am having the same problem, I can get the oleUnderlyingDataObject ok but I am unable to get the method getDataFromHGLOBLAL.

The last line of code returns nothing...

Did you find a resolution to this?

Regards

Bill Terrington

Public Sub New(ByVal underlyingDataObject As System.Windows.Forms.IDataObject)
         'get the underlying dataobject and its ComType IDataObject interface to it 
         Me.underlyingDataObject = underlyingDataObject
         Me.comUnderlyingDataObject = DirectCast(Me.underlyingDataObject, System.Runtime.InteropServices.ComTypes.IDataObject)

         'get the internal ole dataobject and its GetDataFromHGLOBLAL so it can be called later 
         Dim innerDataField As FieldInfo = CType(Me.underlyingDataObject, Object).[GetType].GetField("innerData", BindingFlags.NonPublic Or BindingFlags.Instance)

         Me.oleUnderlyingDataObject = DirectCast(innerDataField.GetValue(Me.underlyingDataObject), System.Windows.Forms.IDataObject)
         Me.getDataFromHGLOBLALMethod = CType(Me.oleUnderlyingDataObject, Object).[GetType].GetMethod("getDataFromHGLOBLAL", BindingFlags.NonPublic Or BindingFlags.Instance)

End Sub

Re: Interface and GetType() - works in C# but not in VB?

David Hovey27-Sep-09 19:37

Re: Interface and GetType() - works in C# but not in VB?

27-Sep-09 19:37

Sorry but I never did find the solution. Not sure if you are using the same code I was (Providing for drag and drop from Outlook)?

I ended up using the original C# code and creating a C# library that my VB program referenced.

Then I ended up using an online code converter and now the program is in c# anyway...

Sorry couldn't be more helpful.

cterrinw27-Sep-09 20:48

cterrinw

27-Sep-09 20:48

I have already created a c library but was hoping to avoid
the overhead if possible.

Thanks for the reply anyway.

Re: Interface and GetType() - works in C# but not in VB?

BrianHoover2-Jan-10 1:04

BrianHoover

2-Jan-10 1:04

David Hovey wrote:
The problem is, as my last post addresses, I'm trying to change code from C# to VB for drag and dropping from Outlook. The original C# code is shown below. The very Odd thing I don't understand is how in C# GetType() works with IDataObject. Inside the DragDrop event of an Windows Form object e.Data.GetType() is usable, but this is not the case in VB.

Translate C#:
FieldInfo innerDataField = this.underlyingDataObject.GetType().GetField("innerData", BindingFlags.NonPublic | BindingFlags.Instance);

TO VB:
Dim innerDataField As FieldInfo = CObj(Me.underlyingDataObject).GetType().GetField("innerData", BindingFlags.NonPublic Or BindingFlags.Instance)

Fred

Re: Interface and GetType() - works in C# but not in VB?

David Hovey2-Jan-10 3:10

Interface code from C# to VB.NET

2-Jan-10 3:10

Thanks Fred. Although it certainly has been awhile since I posted that. Where were you then!?
hahaha. Just a joke.

When I couldn't figure it out I ended up using a .NET library to keep the C# code as it was. Then as it turned out, because I needed more C# experience, I ported my program over to C# and didn't need the code in VB anyway.

All kidding aside. Great work.

David Hovey25-Dec-08 9:12

Problem with dot net (Window forms) user control in Vb6 application

25-Dec-08 9:12

Hello. I am trying to implement drag and drop in my application (from Outlook messages and message attachments) I found the code on a Code Project post, but it is for C#. My application is written in VB, so I'd rather convert the code to VB than add a required DLL to what my program requires.

I need help with the below lines of code. Where I need help is at the CreateStream function for example. I cannot find a equivalent for the "return" section of "[return: MarshalAs(UnmanagedType.Interface)]"

Can you help me?

Thanks.

[ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("0000000B-0000-0000-C000-000000000046")]
public interface IStorage
{
    [return: MarshalAs(UnmanagedType.Interface)]
    IStream CreateStream([In, MarshalAs(UnmanagedType.BStr)] string pwcsName, [In, MarshalAs(UnmanagedType.U4)] int grfMode, [In, MarshalAs(UnmanagedType.U4)] int reserved1, [In, MarshalAs(UnmanagedType.U4)] int reserved2);
    [return: MarshalAs(UnmanagedType.Interface)]
    IStream OpenStream([In, MarshalAs(UnmanagedType.BStr)] string pwcsName, IntPtr reserved1, [In, MarshalAs(UnmanagedType.U4)] int grfMode, [In, MarshalAs(UnmanagedType.U4)] int reserved2);
    [return: MarshalAs(UnmanagedType.Interface)]
    IStorage CreateStorage([In, MarshalAs(UnmanagedType.BStr)] string pwcsName, [In, MarshalAs(UnmanagedType.U4)] int grfMode, [In, MarshalAs(UnmanagedType.U4)] int reserved1, [In, MarshalAs(UnmanagedType.U4)] int reserved2);
    [return: MarshalAs(UnmanagedType.Interface)]
    IStorage OpenStorage([In, MarshalAs(UnmanagedType.BStr)] string pwcsName, IntPtr pstgPriority, [In, MarshalAs(UnmanagedType.U4)] int grfMode, IntPtr snbExclude, [In, MarshalAs(UnmanagedType.U4)] int reserved);
    void CopyTo(int ciidExclude, [In, MarshalAs(UnmanagedType.LPArray)] Guid[] pIIDExclude, IntPtr snbExclude, [In, MarshalAs(UnmanagedType.Interface)] IStorage stgDest);
    void MoveElementTo([In, MarshalAs(UnmanagedType.BStr)] string pwcsName, [In, MarshalAs(UnmanagedType.Interface)] IStorage stgDest, [In, MarshalAs(UnmanagedType.BStr)] string pwcsNewName, [In, MarshalAs(UnmanagedType.U4)] int grfFlags);
    void Commit(int grfCommitFlags);
    void Revert();
    void EnumElements([In, MarshalAs(UnmanagedType.U4)] int reserved1, IntPtr reserved2, [In, MarshalAs(UnmanagedType.U4)] int reserved3, [MarshalAs(UnmanagedType.Interface)] out object ppVal);
    void DestroyElement([In, MarshalAs(UnmanagedType.BStr)] string pwcsName);
    void RenameElement([In, MarshalAs(UnmanagedType.BStr)] string pwcsOldName, [In, MarshalAs(UnmanagedType.BStr)] string pwcsNewName);
    void SetElementTimes([In, MarshalAs(UnmanagedType.BStr)] string pwcsName, [In] System.Runtime.InteropServices.ComTypes.FILETIME pctime, [In] System.Runtime.InteropServices.ComTypes.FILETIME patime, [In] System.Runtime.InteropServices.ComTypes.FILETIME pmtime);
    void SetClass([In] ref Guid clsid);
    void SetStateBits(int grfStateBits, int grfMask);
    void Stat([Out]out System.Runtime.InteropServices.ComTypes.STATSTG pStatStg, int grfStatFlag);
}

Nitin198125-Dec-08 6:42

Nitin1981

25-Dec-08 6:42

Hi! I'm using a Windows form user control in a Vb6 application. I'm having some problems while using the control in Vb6 application.

1. I'm not able to set the value of a combo box in the user control programmatically. i.e At the run time I'm running some code which is not setting the value of the combo box in the Vb6 form.

2. When I click on some Vb6 control on the form then user control gets hidden. I'm adding the user control dynamically at run time.

3. Some module level variable were not able to retain there values in the user control but when I changed them to "Shared type" they were able to retain their values. Similarly progress bar is not able to retain its property values.

I tried searching on the net but could not find any suiable solution.Any kind of help is appreciated.

Thanks

Don't Quit

Re: Problem with dot net (Window forms) user control in Vb6 application

Not Active25-Dec-08 12:21