Introduction

When I create a project for using a DataGrid with a ComboBox, I hope to get a resizable ComboBox to set its height as the height of the DataGrid cell. This is my attempt to create a resizable ComboBox ActiveX, now I can change its Height. Some programmers use a Form, ListBox, TextBox and a Button to create a ComboBox, but I am using a Panel, ComboBox, TextBox and a Button to create my ActiveX. Using a Panel to hide the upper part of the ComboBox and using this Panel as the container for the TextBox and Button.

Using-new-ComboBox-ActiveX-with-Csharp.jpg

About the Project of my ActiveX:

After you expand the files: ComboC.zip, you can open "SizableCombo" solution to read the code of my ActiveX in the "MKCombo" project and read the code to test the ActiveX in the "SizableCombo" project.

I try to use "DataSource" to bind my ActiveX with data but I can't, so then I use another idea.

My ActiveX has:

About the Code

Code to bind the ActiveX with data:

public void cmbBindData(string cmbSql, OleDbConnection cmbCnn, string cmbField)
{
if (cmbCnn.State == ConnectionState.Open)
cmbCnn.Close();
cmbCnn.Open();
OleDbCommand cmdReader = new OleDbCommand(cmbSql, cmbCnn);
OleDbDataReader datRdr = cmdReader.ExecuteReader();
ComboCtrl.Items.Clear();
while (datRdr.Read())
{
ComboCtrl.Items.Add(datRdr[cmbField]);
}
ComboCtrl.SelectedIndex = 0;
}

Remark

When the test project is executed, please resize any row to see how the ComboBox changes its height.

I hope this article is useful. If you have any idea, please tell me.