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Populate ComboBox in Custome Ribbon

How do I populate a combobox that is in a custom ribbon. When I try to use the .Items.Add() method (or whatever it's called) I get an error message that reads:

Cannot convert from 'object' to 'Microsoft.Office.Tools.Ribon.RibbonDropDown'.

I have included the code I have so far.

Any and all help is welcome!
private void ThisWorkbook_Startup(object sender, System.EventArgs e)
        {   

            OracleConnection cs = new OracleConnection("User Id=MyUserID;Password=MyPassword;Data Source=OracleSID");
            OracleDataAdapter da = new OracleDataAdapter("SELECT JOB_CODE, JOB_NAME FROM JCJOB", cs);

            DataTable dt = new DataTable();

            da.Fill(dt);
            
            for (int i = 0; i < dt.Rows.Count; i++)
            {
		//Error is generated at this line!                
		Globals.Ribbons.Ribbon1.cmbProject.Items.Add(dt.Rows[i]["JOB_CODE"]);                
                
            }
        }

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Gary Jones
Asked:
Gary Jones
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3 Solutions
 
Bob LearnedCommented:
You would need to create a RibbonDropDown, and add instances of RibbonDropDownItems.

foreach (DataRow dr in dt.Rows)
{
     string jobCode = dr["JOB_CODE].ToString();
     dropDown.Items.Add(new RibbonDropDownItem() { Label = jobCode });                
}
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Gary JonesDirector of Information TechnologyAuthor Commented:
I am very new to c# so i am not sure what you mean by create a RibbonDropDown and add instanced of RibbonDropDownItems. Can I have an example of what you men?

Thanks in advance.
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Bob LearnedCommented:
To create an instance of an object, you need to use the constructor (new keyword).  

This form might be a little too much for you, so let's rewrite it:

 
dropDown.Items.Add(new RibbonDropDownItem() { Label = jobCode });    

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1) Construct a RibbonDropDown:

RibbonDropDown dropDown = new RibbonDropDown();

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2) Loop through each of your data rows, using the enumerator, instead of an index variable (i in your case):

foreach (DataRow dr in dt.Rows)
{
}

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3) Create RibbonDropDownItems for each row, and add to the RibbonDropDown.  Set the Label fro the drop-down item to the field value.

foreach (DataRow dr in dt.Rows)
{
    RibbonDropDownItem dropDownItem = new RibbonDropDownItem();
    dropDownItem.Label = dr["JOB_CODE].ToString();
}

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4) Add the RibbonDropDown to the control:

Globals.Ribbons.Ribbon1.cmbProject.Items.Add(ribbonDropDown);

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Gary JonesDirector of Information TechnologyAuthor Commented:
I now get thefollowing errors:

Error      1      Cannot create an instance of the abstract class or interface 'Microsoft.Office.Tools.Ribbon.RibbonDropDown'

Error      2      Cannot create an instance of the abstract class or interface 'Microsoft.Office.Tools.Ribbon.RibbonDropDownItem'
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Bob LearnedCommented:
I guess this is the perfect time to say that I really don't like the ribbon bar, so I don't have much experience with it...but, that doesn't mean that I am walking away from this.

Can you tell me if you feel comfortable trying to work with this (meaning:  can you work with it, and does it work)?

RibbonDropDownItem item 
      = Globals.Factory.GetRibbonFactory().CreateRibbonDropDownItem();

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Gary JonesDirector of Information TechnologyAuthor Commented:
TheLearnedOne, I was able to compile the RibbonDropDownItem item = Globals.Factory.GetRibbonFactory().CreateRibbonDropDownItem(); statement, what is the next step?
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Bob LearnedCommented:
Next step:

item.Label = dr["JOB_CODE].ToString();

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Gary JonesDirector of Information TechnologyAuthor Commented:
The code in the "Next step" appears to have worked but now I think I must associate the item.Label to the cmbProject object. How do I add the values to the cmbProject "object" (not sure if that is the correct verbiage). Sorry, but I am extremely new to c# programming (no duh, right ;)).
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Bob LearnedCommented:
Next step is to create a RibbonDropDown:

RibbonDropDown dropDown = Globals.Factory.GetRibbonFactory().CreateRibbonDropDown(); 

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Gary JonesDirector of Information TechnologyAuthor Commented:
The RibbonDropDown (dropDown) has been created. I keep trying to add item.Label to the dropDown but I know I am still missing something as nothing is working. So, after the RibbonDropDown and RibbonDropDownItems have been created successfully, what is the next step?
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Bob LearnedCommented:
Next step is to add the dropdown items to the dropdown:

dropDown.Items.Add(item);

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Gary JonesDirector of Information TechnologyAuthor Commented:
Error: Index must be within the bounds of the list. Parameter name: index. Not sure what that means but that is the error I get now.
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Gary JonesDirector of Information TechnologyAuthor Commented:
TheLearnedOne, I figured out where the syntax has to go, I did not put the RibbonDropDownItem statement in the foreach section of the code so only one dropdown item was getting created and I have multiple items to add. I have attached the final code that works.
foreach (DataRow dr in dt.Rows)
            {
                RibbonDropDownItem item = Globals.Factory.GetRibbonFactory().CreateRibbonDropDownItem();
                
                item.Label = dr["JOB_CODE"].ToString();                
                Globals.Ribbons.Ribbon1.cmbProject.Items.Add(item);
            }

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Gary JonesDirector of Information TechnologyAuthor Commented:
I had a difficult time following the code, I did not know where the code needed to go and was confused (the reason for B grade).
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