HOWTO: Enumerate Cluster Resources by Resource Type in Visual Basic

ID: Q244597

The information in this article applies to:

Microsoft Cluster Server

SUMMARY

The sample code provided in this article demonstrates how to enumerate all of the resources of a specific resource type on a cluster. This is accomplished through the use of Microsoft Cluster Automation Server (CAS), which is a set of COM objects that acts as an interface to Microsoft Cluster Server.

MORE INFORMATION

To run the sample code, CAS must be installed. For additional information about the availability of CAS, click the article number below to view the article in the Microsoft Knowledge Base:

Q245656 INFO: Where to Obtain Cluster Automation Server

To run the code, the client must have access permissions granted on the cluster. Access permissions are set through the Cluster Administrator.

From Visual Basic:

Start a new Standard EXE project.

Reference the CAS components in the project:
1. From the Project menu, select References.
2. Click to select the Microsoft Cluster Service Automation Classes check box.
3. Click OK.

Add a text box (Text1) and a command button (Command1) to the default form.

Double-click the Command1 button. This action will take you to the code for the form.

Add the following code to the Command1_Click click event:


Private Sub Command1_Click()
    Dim objCluster As New Cluster
    Dim colResTypes As ClusResTypes
    Dim colResType As ClusResType
    Dim colResTypeResources As ClusResTypeResources
    Dim clusResource As clusResource
    Dim colClusProperties As ClusProperties
          
    On Error GoTo Handle_Error
    'Change this to point to your cluster.
    objCluster.Open ("")
    
    Set colResTypes = objCluster.ResourceTypes
        
    'Get the resource type collection object
    Set colResType = colResTypes.Item(Text1.Text)
    
    Set colResTypeResources = colResType.Resources

    'Enumerate all of the resources in the collection.
    'Display a msgbox for each.
    For Each clusResource In colResTypeResources
        Set colClusProperties = clusResource.CommonProperties
        MsgBox Text1.Text & " resource name: " & clusResource.Name
    Next
    
    Exit Sub

Handle_Error:
    MsgBox Text1.Text & ": resource type not found"

End Sub

Change the following line of code to open the cluster you want to access:
```
objCluster.Open("") 
```
For example, if your cluster is named "mycluster," change the code to the following:
```
objCluster.Open("mycluster") 
```
Passing an empty string causes the code to attempt to open a connection to a cluster on the local machine.

Press F5 or click Run to run the program.

In the text box, enter the name of the resource type you want to enumerate the resources of. Note that this entry is case-sensitive.

Click the Command1 button. Notice that a message box is displayed for each resource that is of the type that you specified in the text box.

REFERENCES

For additional information, click the article number below to view the article in the Microsoft Knowledge Base:

Q244584 HOWTO: Enumerate Cluster Resources by Resource Type in Visual C++

Q245656 INFO: Where to Obtain Cluster Automation Server

Additional query words:

Keywords : kbClustServ kbDSupport
Version : winnt:
Platform : winnt
Issue type : kbhowto