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Hi,
I am wanting to enumerate some registry keys and then retrieve a value and enter something into a listbox or combobox.
For example, I have the following key in the registry HKEY_LOCAL_MACHINE\Software\Test. Under this I have several other sub keys, called for example sub1, sub2 and sub3. In each of these sub keys, I need to retrieve the value of InstallPath string from each of those sub keys, and then put the value into a combobox or listview.
I think I need to enumerate through the subkeys as they can be different, only the main key Test will remain the same.
Any help is appreciated.
Thanks, Andrew.
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Sounds to me like what you really need is a Tree View to show it, not a combo box. If that was me coding it though, I would use a simple while loop to step through the key structure.
Pete Soheil
DigiOz Multimedia
http://www.digioz.com
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I am trying to find out how to check to see if a control exists (such as a listbox). If it does, then the program wouldn't do anything, if it doesn't, then the program would create it. Does anyone know how to do this or can point me in the right direction?
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Why don't you use a variable to hold the reference to the listbox and set it to Nothing whenever it isn't instantiated?
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
[my articles]
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You should really be checking for the existance of the piece of data that triggered the control being created, not checking for the control itself.
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Development Environment: Microsoft Visual Studio 2005
Code Behind: VB.net
We created a Class Library.
That Class Library contains some modules and some windows forms.
The assembly of the class library, we referred in a Windows Applications.
In that Windows Application, we have one method that will create the instance for the Class library Form using Activator.CreateInstance method. While creating the Type of the Class Library Form, it is showing the exception as Type Load.
While seeing the exception message, we come to know that the method trying to find the Class Library Form in the Windows application itself.
Please tell me how to access the Class Library Form from Windows Application dynamically.
Please give the solution.
Thanks in advance.
Nagarajan R.J.
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Let's see the code you used to try to create this instance. You've probably missed something very basic in the process.
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I have several no. of records in the database for payroll processing. The Employee Code No. is the primary key and a employeemaster table is connected through coding. When am in the processing screen, if i enter or select the employee code no. the other columns must be automatically filled or a search form that displays info. abt the emp name, desig etc. How to design a search form for this and write coding. Pls help Me?
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- Put the label and textbox that the user can enter EmployeeNo
- Add the Grid for displaying the result.
- Add one button that the user can click for searching..
- In button click event, write the code to query the data from database with filter. And bind it to Grid.
That's all.
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hi S.SRIVATHSAN
i have an Article that has exactly what you want,our friend who jst gave you an advice now, is right, and the article you find Example vb codes
http://www.codeproject.com/KB/vb/N-Tier_Application_VB.aspx[^]
Hope this Helps
Thanks
Vuyiswa Maseko,
Sorrow is Better than Laughter, it may Sadden your Face, but It sharpens your Understanding
VB.NET/SQL7/2000/2005
http://vuyiswamb.007ihost.com
http://Ecadre.007ihost.com
vuyiswam@tshwane.gov.za
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<br />
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _<br />
<br />
Partial Class Form1<br />
<br />
Inherits System.Windows.Forms.Form<br />
<br />
'Form overrides dispose to clean up the component list.<br />
<br />
<System.Diagnostics.DebuggerNonUserCode()> _<br />
<br />
Protected Overrides Sub Dispose(ByVal disposing As Boolean)<br />
<br />
Try<br />
<br />
If disposing AndAlso components IsNot Nothing Then<br />
<br />
components.Dispose()<br />
<br />
End If<br />
<br />
Finally<br />
<br />
MyBase.Dispose(disposing)<br />
<br />
End Try<br />
<br />
End Sub<br />
<br />
<br />
<br />
Friend WithEvents CustomerID As System.Windows.Forms.DataGridViewTextBoxColumn<br />
<br />
'Required by the Windows Form Designer<br />
<br />
Private components As System.ComponentModel.IContainer<br />
<br />
'NOTE: The following procedure is required by the Windows Form Designer<br />
<br />
'It can be modified using the Windows Form Designer. <br />
<br />
'Do not modify it using the code editor.<br />
<br />
<System.Diagnostics.DebuggerStepThrough()> _<br />
<br />
Private Sub InitializeComponent()<br />
<br />
Me.Label1 = New System.Windows.Forms.Label<br />
<br />
Me.DataGridView1 = New System.Windows.Forms.DataGridView<br />
<br />
Me.CustomerID = New System.Windows.Forms.DataGridViewTextBoxColumn<br />
<br />
CType(Me.DataGridView1, System.ComponentModel.ISupportInitialize).BeginInit()<br />
<br />
Me.SuspendLayout()<br />
<br />
'<br />
<br />
'Label1<br />
<br />
'<br />
<br />
Me.Label1.AutoSize = True<br />
<br />
Me.Label1.Location = New System.Drawing.Point(13, 181)<br />
<br />
Me.Label1.Name = "Label1"<br />
<br />
Me.Label1.Size = New System.Drawing.Size(39, 13)<br />
<br />
Me.Label1.TabIndex = 0<br />
<br />
Me.Label1.Text = "Label1"<br />
<br />
'<br />
<br />
'DataGridView1<br />
<br />
'<br />
<br />
Me.DataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize<br />
<br />
Me.DataGridView1.Columns.AddRange(New System.Windows.Forms.DataGridViewColumn(){Me.CustomerID})<br />
<br />
Me.DataGridView1.Location = New System.Drawing.Point(16, 12)<br />
<br />
<big>Me.DataGridView1.MultiSelect = False</big><br />
<br />
Me.DataGridView1.Name = "DataGridView1"<br />
<br />
<big>Me.DataGridView1.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect</big><br />
<br />
Me.DataGridView1.Size = New System.Drawing.Size(240, 150)<br />
<br />
Me.DataGridView1.TabIndex = 1<br />
<br />
'<br />
<br />
'CustomerID<br />
<br />
'<br />
<br />
Me.CustomerID.HeaderText = "CustomerID"<br />
<br />
Me.CustomerID.Name = "CustomerID"<br />
<br />
'<br />
<br />
'Form1<br />
<br />
'<br />
<br />
Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)<br />
<br />
Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font<br />
<br />
Me.ClientSize = New System.Drawing.Size(284, 264)<br />
<br />
Me.Controls.Add(Me.DataGridView1)<br />
<br />
Me.Controls.Add(Me.Label1)<br />
<br />
Me.Name = "Form1"<br />
<br />
Me.Text = "Form1"<br />
<br />
CType(Me.DataGridView1, System.ComponentModel.ISupportInitialize).EndInit()<br />
<br />
Me.ResumeLayout(False)<br />
<br />
Me.PerformLayout()<br />
<br />
End Sub<br />
<br />
Friend WithEvents Label1 As System.Windows.Forms.Label<br />
<br />
Friend WithEvents DataGridView1 As System.Windows.Forms.DataGridView<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
'this is the method I'm talking about:<br />
<br />
<big>Private Sub DataGridView1_SelectionChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DataGridView1.SelectionChanged<br />
<br />
Label1.Text = sender.SelectedRows(0).Cells("CustomerID").Value.ToString<br />
<br />
'last line causes either an ArgumentOutOfRangeException saying 'Index is out of range'<br />
<br />
'or an ArgumentException (see details below)<br />
<br />
End Sub</big><br />
End Class<br />
<br />
<br />
<br />
<br />
Shimi
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Hi Shimi
I am using the following code which works for me
DataGrid_search.CurrentRow.Cells.Item(0).Value.ToString()
Good Luck
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Hi,
I am currently writing an application which in simple terms is used for logging in and out hardware repairs. On one of the forms in this project, I have a data grid view control, two command buttons and a text box. The problem that I am having is that I do not understand how to code a data grid view - I have tried source code from many sites but cannot get my head around it. I have provided a description below of what it is I want the grid view to be populated with. After getting that working, It'd also be great to know how I can filter it using the AutoID number or Serial Number by using the text box and a seperate button each for the serial no or AutoID.
Fields in the table in question: AutoID, DateReceived, Customer, Location, SerialNo, ProductNo, ReferenceNo, ReportedFaults, DateToSym, SymRepeatNotes, SymFaultsFound, SymRepairDescription, SymDateReturned, SymLeopardServices, SymRepeatRepair, DateRepaired, Technician, RepeatRepair, FaultsFound, Notes, ActualRepair, PartsUsed, DateOut, RepairDescription, TotalCharges, BillType, ShipmentDate.
Fields I want shown in the datagrid: AutoID, DateReceived, Customer, SerialNo, ProductNo, ReportedFaults, ActualRepair.
It needs to be filtered by Serial Numnber or Auto ID Number using the method mentioned above.
If anyone could provide me with some sample code, a link to another message on this site, or even build me some code based on what I need with some notes in it, it'd be greatly appreciated.
Thankyou in advance.
Brett.
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brettfk1010 wrote: DataGridView Control in VB6
There's noi such thing as a DataGridView control in VB6. DataGridView didn't show up until .NET 2.0 (VB.NET 2005).
So which is it?? VB6 or VB.NET 2005??
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My apologies
I am trying to use the Data Bound Grid Control or DataGrid Control to do it, whichever is easier.
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I have a DataSet i want to make one cloumn as pivot ...Is there any solutin
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AFAIK, the default one doesn't have that feature.. You probably need to find the third-party one. I wonder why you want to make one column as pivot..
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Colleagues,
Could you recommend a 2D chart control for my application that can work with VB6? I need to plot an EEG signal on the screen in real time. The update rate of the chart will be on the order of 200ms to 1000ms, and I want to display 1000 points. Ideally, the whole chart would scroll to the left as new values are added on the right.
I’ve tried the MSChart, it would work ok, but I don’t know how to get rid of flickering. Flickering is a real problem, because somebody will be looking at the chart for hours.
Thanks and have a happy new year!
- Nick
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Have you tried to use DoEvents?
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No, I haven't tried to use DoEvents. How would that stop the flickering?
I suspect that MSChart flickers, because it doesn't do the double buffering.
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Nick Alexeev wrote: I suspect that MSChart flickers, because it doesn't do the double buffering.
I also think so.. but at least, you can try DoEvent. if it helps, you don't need to change. if not, you need to find the third-party one as other suggested..
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The MSChart control isn't a good candidate for this problem. You'd be better off using a third party component to draw a scrolling line graph, or making your own control so you can have more control over exactly how it's drawn.
DoEvents won't do anything for you here. In fact, there's nothing you can do about the flickering using the MSChart control.
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Dave Kreskowiak wrote: The MSChart control isn't a good candidate for this problem. ... In fact, there's nothing you can do about the flickering using the MSChart control.
Yes, I can agree that MSChart is not a good tool for this job. I've searched the web for suggestion on how to make good real-time plots with MSChart and tried every suggestion I could find, but the results weren't good enough.
Dave Kreskowiak wrote: You'd be better off using a third party component to draw a scrolling line graph, or making your own control ...
Unfortunately, I don't have the time to make my own control, although that could be a fun endeavor. Which 3rd party chart controls would you recommend?
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Don't know. I haven't used any StripGraph controls.
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Dave Kreskowiak wrote: MSChart control isn't a good candidate for this problem. You'd be better off using a third party component to draw a scrolling line graph, or making your own control so you can have more control over exactly how it's drawn.
I don't think I could agree more.
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
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