How to Use ComboBox in Windows Forms

Here, I will explain how to use a combo box in a Windows application. Before this I explain how to delete selected data from the database.

Step 1: Registration form with a ComboBox

Drag and down a ComboBox and a button from the Toolbox and provide the name of the button as "Add string".

Step 2: Code1

At first step I want that when I enter a name and click the Button (Add string) then that name shows in the ComboBox.
So click on the Add String button and write this code.

 

private void Addstring_Click(object sender, EventArgs e)
{
    string namestr = Name_txt.Text;
    comboBox1.Items.Add(namestr);
}

Step 3: Output for code1

When you enter a name in the TextBox and click on the button (add string). You will see that the name will show in the comboBox.

 

Step 4: Code2

Now if we want, when I click on any name in the ComboBox that the name shows in a TextBox. so now for the code for that. Click on the combo box and write this code. I want that selected name from the combo box shown in the Id TextBox.

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    Eid_txt.Text = comboBox1.text;
}

Step 5: Output for code2

Now select any name in the ComboBox and that name will be shown in the Id TextBox.

 

You can also see this in my blog_munesh.