How can I programatically add items to an ExpressionEdit ComboBox?

Items can be statically added using the ActiveX Properities/ComboBoxItems. How can this be done programatically from C#? I am using C# 2008 and TestStand 4.1.
Solved!
Go to Solution.

Doug-
That was the answer. I was missing an assembly reference which was why I wasn't able to use the ExpressionEdit.ComboBoxItems methods. I had "NationalInstruments.TestStand.Interop.UI.AxControls" reference in my project but also needed to have "NationalInstruments.TestStand.Interop.UI" and "NationalInstruments.TestStand.Interop.Ui.Support" assemblies. ExpressionEdit.ComboBoxItems.Insert() is working fine now.
Without your input, I wouldn't have gone back to examine my references. Thanks.

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@"\s+" + //# Whitespace \n
@"(?<size>\d+)" +
@"\s+" + //# Whitespace \n
@"(?<month>\w{3})" + //# Month (3 letters) \n
@"\s+" + //# Whitespace \n
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private int total_dirs;
private int searched_until_now_dirs;
private int max_percentage;
private TreeNode directories_real_time;
private string SummaryText;
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var files = directoryListing.Where(d => !d.IsDirectory);
total_dirs += directories.Count<FTPListDetail>();
searched_until_now_dirs++;
int percentage = 0;
foreach (var dir in directories)
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if (recursive_levl == 1)
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this.BeginInvoke(new MethodInvoker( delegate
UpdateList(temp_tn);
percentage = (searched_until_now_dirs * 100) / total_dirs;
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max_percentage = percentage;
backgroundWorker1.ReportProgress(percentage, SummaryText);
percentage = (searched_until_now_dirs * 100) / total_dirs;
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file_tree_node.Tag = "file" ;
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numberOfFiles.Add(file.FullPath);
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Then updating the treeView:
DateTime last_update;
private void UpdateList(TreeNode tn_rt)
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if (ts.TotalMilliseconds > 200)
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treeViewMS1.Nodes.Add(tn_rt);
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And inside a backgroundworker do work how i'm using it:
var root = Convert.ToString(e.Argument);
var dirNode = CreateDirectoryNode(root, "root", 1);
e.Result = dirNode;
And last the FTPListDetail class:
public class FTPListDetail
public bool IsDirectory
get
return !string.IsNullOrWhiteSpace(Dir) && Dir.ToLower().Equals("d");
internal string Dir { get; set; }
public string Permission { get; set; }
public string Filecode { get; set; }
public string Owner { get; set; }
public string Group { get; set; }
public string Name { get; set; }
public string FullPath { get; set; }
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Both var files and directoryListing are IEnumerable<FTPListDetail> type.
The most important is to make the number 1 i mentioned and then to do number 2.

Risa no.
What i mean is this. This is a screenshot of my ftp server at my host(ipage.com).
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What i want it to be is that on my program on the treeView i will also display the files like in my ftp server.
I see in my program only the directories and the files in the directories but i don't see the files on the root directory/node.
I need it to be like in my ftp server i need to see in my program the htaccess 1.txt 2.png and so on.
So what i wrote in my main question is that in the var files i see this files of the root directory i just don't know to add and display them in my treeView(my treeView is treeViewMS1).
I know i checked in my program in the method CreateDirectoryNode i see in the first iteration of the recursive that var files contain this root files i just dont know how to add and display them in my treeView.
On the next iterations when it does the recursive it's adding the directories hello stats test and the files in this directories but i need it to first add the root files.

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How can I programati​cally add items to an Expression​Edit ComboBox?

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How can I programatically add items to an ExpressionEdit ComboBox?