how to check whether the item in the combo box is selected or not in c#?

Question

im having a combo box in which i have to display dates from database...user have to select a date from the combo box to proceed further...but im not able to make the user aware of selecting the item from the combo box first to proceed further...what is the process so that a user can get a message if he has not selected the date from the combo..

Answer 1

check the text property like this

if (combobox.text != String.Empty)
{
//continue
}
else
{
// error message
}

Answer 2

if (cboDate.SelectedValue!=null)
{
      //there is a selected value in the combobox
}
else
{
     //no selected value
}

Answer 3

You can use SelectedIndex or SelectedItem properties of the ComboBox.

Answer 4

if (string.IsNullOrEmpty(ComboBox.SelectedText)) 
{
 MessageBox.Show("Select a date");
}

Answer 5

You'll want to use DropDownStyle = DropDownList so you can easily make sure that the user picked an entry from the list and can't type random text in the box. Add an empty item to Items before you populate it (or "Please select"). Now, the default is automatically empty and the test is simple: just check that SelectedIndex > 0.