How to create a new source code branch using the TFS API?

Question

I am trying to create a new branch using the API and have used both PendBranch(), and CreateBranch(). The problem with CreateBranch()is immediate commit, and I want to be able to add comments as the branch is checked. So, I did what I did, shown below.

Basically, I get all the information, such as the server element and the local element that will be displayed, as well as the source and target of the branch from my Windows application.

Somehow, when I see the Source Control Explorer, it still says “Not mapped”, although I created a: workspace.Get()after creating the workspace andworkspace.Map(serverItem,localItem)

Can anyone shed some light on this?

public void CreateNewBranch(string server,string serverItem,string localItem,string sourceBranch, string targetBranch)
    {
        int changeSetNumber = 0;
        // Get a reference to Team Foundation Server and Source Control.
        tfs = GetTFS(server);
        // Create a new workspace for the currently authenticated user.             
      workspace = tfvc.CreateWorkspace("Example Workspace", tfvc.AuthenticatedUser);
        }
        // Create a mapping to the project.
        try
        {
           workspace.Map(serverItem, localItem);

            // Get the latest source files from the repository.
            //workspace.Get();

            // Perform a pending Branch operation. 
            workspace.PendBranch(sourceBranch, targetBranch, VersionSpec.Latest);
            // Get a list of all the Pending Changes.
            PendingChange[] pendingChanges = workspace.GetPendingChanges();
            if (pendingChanges.Length > 0)
            {
                changeSetNumber = workspace.CheckIn(pendingChanges, "Comment:Branch Created");
                MessageBox.Show("Checked in changeset # " + changeSetNumber);
            }
        }
        catch (Exception e)
        {
            MessageBox.Show(e.Message);
        }
        finally
        {
            // Cleanup the workspace.
            workspace.Delete();
        }
    }

Answer 1

TFS . - , CreateBranch, VS2008/TFS2008 SP1:

public void CreateBranchWithComment(
    string serverUrl, 
    string sourcePath, 
    string targetPath, 
    string comment)
{
    TeamFoundationServer tfs = new TeamFoundationServer(serverUrl);
    VersionControlServer vcServer = 
        (VersionControlServer)tfs.GetService(typeof(VersionControlServer));

    int changesetId = vcServer.CreateBranch(
        sourcePath, 
        targetPath, 
        VersionSpec.Latest);

    Changeset changeset = vcServer.GetChangeset(changesetId);
    changeset.Comment = comment;
    changeset.Update();

}