Walkthrough: Adding Controls to a Worksheet at Run Time in an Application-Level Project

You can add controls to any open worksheet by using an Excel add-in. This walkthrough demonstrates how to use the Ribbon to enable users to add a Button, a NamedRange, and a ListObject to a worksheet. For information, see Adding Controls to Office Documents at Run Time.

Applies to: The information in this topic applies to application-level projects for Excel 2010. For more information, see Features Available by Office Application and Project Type.

This walkthrough illustrates the following tasks:

• Providing a user interface (UI) to add controls to the worksheet.

• Adding controls to the worksheet.

• Removing controls from the worksheet.

Prerequisites

You need the following components to complete this walkthrough:

• An edition of Visual Studio 2012 that includes the Microsoft Office developer tools. For more information, see Configuring a Computer to Develop Office Solutions.

• Excel 2013 or Excel 2010.

Creating a New Excel Add-in Project

Start by creating an Excel add-in project.

To create a new Excel add-in project

1. In Visual Studio, create an Excel add-in project with the name ExcelDynamicControls. For more information, see How to: Create Office Projects in Visual Studio.

2. Add a reference to the Microsoft.Office.Tools.Excel.v4.0.Utilities.dll assembly. This reference is required to programmatically add a Windows Forms control to a worksheet later in this walkthrough.

Providing a UI to Add Controls to a Worksheet

Add a custom tab to the Excel Ribbon. Users can select check boxes on the tab to add controls to a worksheet.

To provide a UI to add controls to a worksheet

1. On the Project menu, click Add New Item.

2. In the Add New Item dialog box, select Ribbon (Visual Designer), and then click Add.

   A file named Ribbon1.cs or Ribbon1.vb opens in the Ribbon Designer and displays a default tab and group.

3. From the Office Ribbon Controls tab of the Toolbox, drag a CheckBox control onto group1.

4. Click CheckBox1 to select it.

5. In the Properties window, change the following properties.

   Property	Value
   Name	Button
   Label	Button

6. Add a second check box to group1, and then change the following properties.

   Property	Value
   Name	NamedRange
   Label	NamedRange

7. Add a third check box to group1, and then change the following properties.

   Property	Value
   Name	ListObject
   Label	ListObject

Adding Controls to the Worksheet

Managed controls can only be added to host items, which act as containers. Because add-in projects work with any open workbook, the add-in converts the worksheet into a host item, or gets an existing host item, before adding the control. Add code to the click event handlers of each control to generate a Worksheet host item that is based on the open worksheet. Then, add a Button, a NamedRange, and a ListObject at the current selection in the worksheet.

To add controls to a worksheet

1. In the Ribbon Designer, double-click Button.

   The Click event handler of the Button check box opens in the Code Editor.

2. Replace the Button_Click event handler with the following code.

   This code uses the GetVstoObject method to get a host item that represents the first worksheet in the workbook, and then adds a Button control to the currently selected cell.

   Private Sub Button_Click(ByVal sender As System.Object, _
       ByVal e As Microsoft.Office.Tools.Ribbon.RibbonControlEventArgs) _
           Handles Button.Click
   
       Dim NativeWorksheet As Microsoft.Office.Interop.Excel.Worksheet =
           Globals.ThisAddIn.Application.ActiveWorkbook.Worksheets(1)
   
       Dim worksheet As Microsoft.Office.Tools.Excel.Worksheet =
           Globals.Factory.GetVstoObject(NativeWorksheet)
   
   
       Dim buttonName As String = "MyButton" 
   
       If CType(sender, RibbonCheckBox).Checked Then 
           Dim selection As Excel.Range = Globals.ThisAddIn.Application.Selection
           If Not (selection Is Nothing) Then 
               Dim button As New Microsoft.Office.Tools.Excel.Controls.Button()
               worksheet.Controls.AddControl(button, selection, buttonName)
           End If 
       Else
           worksheet.Controls.Remove(buttonName)
       End If 
   End Sub
   

   private void Button_Click(object sender, RibbonControlEventArgs e)
   {
       Worksheet worksheet = Globals.Factory.GetVstoObject(
           Globals.ThisAddIn.Application.ActiveWorkbook.Worksheets[1]);
   
   
       string buttonName = "MyButton";
   
       if (((RibbonCheckBox)sender).Checked)
       {
           Excel.Range selection = Globals.ThisAddIn.Application.Selection as Excel.Range;
           if (selection != null)
           {
               Microsoft.Office.Tools.Excel.Controls.Button button =
                   new Microsoft.Office.Tools.Excel.Controls.Button();
               worksheet.Controls.AddControl(button, selection, buttonName);
           }
       }
       else
       {
           worksheet.Controls.Remove(buttonName);
       }
   }
   

3. In Solution Explorer, select Ribbon1.cs or Ribbon1.vb.

4. On the View menu, click Designer.

5. In the Ribbon Designer, double-click NamedRange.

6. Replace the NamedRange_Click event handler with the following code.

   This code uses the GetVstoObject method to get a host item that represents the first worksheet in the workbook, and then defines a NamedRange control for the currently selected cell or cells.

   Private Sub NamedRange_Click(ByVal sender As System.Object, _
       ByVal e As Microsoft.Office.Tools.Ribbon.RibbonControlEventArgs) _
           Handles NamedRange.Click
   
       Dim NativeWorksheet As Microsoft.Office.Interop.Excel.Worksheet =
           Globals.ThisAddIn.Application.ActiveWorkbook.Worksheets(1)
   
       Dim worksheet As Microsoft.Office.Tools.Excel.Worksheet =
           Globals.Factory.GetVstoObject(NativeWorksheet)
   
       Dim rangeName As String = "MyNamedRange" 
   
       If CType(sender, RibbonCheckBox).Checked Then 
           Dim selection As Excel.Range = Globals.ThisAddIn.Application.Selection
           If Not (selection Is Nothing) Then 
               Dim namedRange As NamedRange = _
                   worksheet.Controls.AddNamedRange(selection, rangeName)
           End If 
       Else
           worksheet.Controls.Remove(rangeName)
       End If 
   End Sub
   

   private void NamedRange_Click(object sender, RibbonControlEventArgs e)
   {
       Worksheet worksheet = Globals.Factory.GetVstoObject(
           Globals.ThisAddIn.Application.ActiveWorkbook.Worksheets[1]);
   
   
       string Name = "MyNamedRange";
   
       if (((RibbonCheckBox)sender).Checked)
       {
           Excel.Range selection = Globals.ThisAddIn.Application.Selection as Excel.Range;
           if (selection != null)
           {
               worksheet.Controls.AddNamedRange(selection, Name);
           }
       }
       else
       {
           worksheet.Controls.Remove(Name);
       }
   }
   

7. In the Ribbon Designer, double-click ListObject.

8. Replace the ListObject_Click event handler with the following code.

   This code uses the GetVstoObject method to get a host item that represents the first worksheet in the workbook, and then defines a ListObject for the currently selected cell or cells.

   Private Sub ListObject_Click(ByVal sender As System.Object, _
       ByVal e As Microsoft.Office.Tools.Ribbon.RibbonControlEventArgs) _
           Handles ListObject.Click
   
       Dim NativeWorksheet As Microsoft.Office.Interop.Excel.Worksheet =
           Globals.ThisAddIn.Application.ActiveWorkbook.Worksheets(1)
   
       Dim worksheet As Microsoft.Office.Tools.Excel.Worksheet =
           Globals.Factory.GetVstoObject(NativeWorksheet)
   
   
       Dim listObjectName As String = "MyListObject" 
   
       If CType(sender, RibbonCheckBox).Checked Then 
           Dim selection As Excel.Range = _
               Globals.ThisAddIn.Application.Selection
           If Not (selection Is Nothing) Then
               worksheet.Controls.AddListObject(selection, listObjectName)
           End If 
       Else
           worksheet.Controls.Remove(listObjectName)
       End If 
   End Sub
   

   private void ListObject_Click(object sender, RibbonControlEventArgs e)
   {
       Worksheet worksheet = Globals.Factory.GetVstoObject(
           Globals.ThisAddIn.Application.ActiveWorkbook.Worksheets[1]);
   
   
       string listObjectName = "MyListObject";
   
       if (((RibbonCheckBox)sender).Checked)
       {
           Excel.Range selection = Globals.ThisAddIn.Application.Selection as Excel.Range;
           if (selection != null)
           {
               worksheet.Controls.AddListObject(selection, listObjectName);
           }
       }
       else
       {
           worksheet.Controls.Remove(listObjectName);
       }
   }
   

9. Add the following statements to the top of the Ribbon code file.

   Imports Excel = Microsoft.Office.Interop.Excel
   Imports Microsoft.Office.Tools.Excel
   Imports Microsoft.Office.Tools.Excel.Extensions
   

   using Excel = Microsoft.Office.Interop.Excel;
   using Microsoft.Office.Tools.Excel;
   using Microsoft.Office.Tools.Excel.Extensions;
   

Removing Controls from the Worksheet

Controls are not persisted when the worksheet is saved and closed. You should programmatically remove all generated Windows Forms controls before the worksheet is saved, or only an outline of the control will appear when the workbook is opened again. Add code to the WorkbookBeforeSave event that removes Windows Forms controls from the controls collection of the generated host item. For more information, see Persisting Dynamic Controls in Office Documents.

To remove controls from the worksheet

1. In Solution Explorer, select ThisAddIn.cs or ThisAddIn.vb.

2. On the View menu, click Code.

3. Add the following method to the ThisAddIn class. This code gets the first worksheet in the workbook and then uses the HasVstoObject method to check whether the worksheet has a generated worksheet object. If the generated worksheet object has controls, the code gets that worksheet object and iterates through the control collection, removing the controls.

   Sub Application_WorkbookBeforeSave _
       (ByVal workbook As Microsoft.Office.Interop.Excel.Workbook, _
        ByVal SaveAsUI As Boolean, ByRef Cancel As Boolean) _
        Handles Application.WorkbookBeforeSave
   
       Dim worksheet As Excel.Worksheet = workbook.Worksheets(1)
   
       If Globals.Factory.HasVstoObject(worksheet) And
           Globals.Factory.GetVstoObject(worksheet).Controls.Count > 0 Then 
           Dim vstoWorksheet As Worksheet = Globals.Factory.GetVstoObject(worksheet)
   
           While vstoWorksheet.Controls.Count > 0
               Dim vstoControl As Object = vstoWorksheet.Controls(0)
               vstoWorksheet.Controls.Remove(vstoControl)
           End While 
       End If 
   End Sub
   

   void Application_WorkbookBeforeSave(Microsoft.Office.Interop.Excel.Workbook workbook, 
       bool SaveAsUI, ref bool Cancel)
   {
       Excel.Worksheet worksheet =
           workbook.Worksheets[1] as Excel.Worksheet;
   
       if (Globals.Factory.HasVstoObject(worksheet) && 
           Globals.Factory.GetVstoObject(worksheet).Controls.Count > 0)
       {
           Worksheet vstoWorksheet = Globals.Factory.GetVstoObject(worksheet);
   
   
   
           while (vstoWorksheet.Controls.Count > 0)
           {
               object vstoControl = vstoWorksheet.Controls[0];
               vstoWorksheet.Controls.Remove(vstoControl);
           }
   
       }
   }
   

4. In C#, you must create an event handler for the WorkbookBeforeSave event. You can place this code in the ThisAddIn_Startup method. For more information about creating event handlers, see How to: Create Event Handlers in Office Projects. Replace the ThisAddIn_Startup method with the following code.

   private void ThisAddIn_Startup(object sender, System.EventArgs e)
   {
       this.Application.WorkbookBeforeSave += 
           new Microsoft.Office.Interop.Excel.AppEvents_WorkbookBeforeSaveEventHandler
               (Application_WorkbookBeforeSave);
   }
   

Testing the Solution

Add controls to a worksheet by selecting them from a custom tab on the Ribbon. When you save the worksheet, these controls are removed.

To test the solution.

1. Press F5 to run your project.

2. Select any cell in Sheet1.

3. Click the Add-Ins tab.

4. In the group1 group, click Button.

   A button appears in the selected cell.

5. Select a different cell in Sheet1.

6. In the group1 group, click NamedRange.

   A named range is defined for the selected cell.

7. Select a series of cells in Sheet1.

8. In the group1 group, click ListObject.

   A list object is added for the selected cells.

9. Save the worksheet.

   The controls that you added to Sheet1 no longer appear.

Next Steps

You can learn more about controls in Excel add-in projects from this topic:

• To learn about how to save controls to a worksheet, see the Excel Add-In Dynamic Controls Sample at Office Development Samples and Walkthroughs.

See Also

Concepts

Windows Forms Controls on Office Documents Overview

NamedRange Control

ListObject Control

Other Resources

Excel Solutions

Controls on Office Documents