C＃ComboBox字符串值到对象变量到类？

Question

I'm attempting to take a string value from a Combo box then pass it through an object variable to a class and store it there in a string variable.

 private void cboTimeZone_SelectedValueChanged(object sender, EventArgs e)
 {
     extTime1.timeZone = cboTimeZone.SelectedItem;
 }

I'm not totally use to the combo box options to use so.

Answer 1

Does the cboTimeZone contain string objects? In this case, a simple cast should be enough if extTime1.timeZone is a string:

extTime1.timeZone = (string)cboTimeZone.SelectedItem

if cboTimeZone was filled with objects of type myObject , u can use the ToString() method on the item if you overwrote it in your myObject class:

extTime1.timeZone = cboTimeZone.SelectedItem.ToString()

If you selected a specific property MyProperty of myObject to be shown in the combo box, you can first cast to the object and then access the property by using

extTime1.timeZone = ((myObject)cboTimeZone.SelectedItem).MyProperty

to get that property as a result.

Hope that helps.

Answer 2

It's not clear from your question whether your ComboBox is data-bound or not; either way, I think it would be a good idea to first figure out if SelectedItem is indeed the correct property to use, or if there's another, more appropriate one.

If you've set a DataSource for your ComboBox , you've probably also set a DisplayMember . In that case, the DisplayMember will determine which property of the currently selected item of the data source will be shown in the ComboBox as text.

If you've set a ValueMember , you can also use the SelectedValue property to retrieve that property of the currently selected data source item.

SelectedItem simply retrieves the currently selected data source item. This may be a complex object, or a string object, or something else; check with your data source.

The ComboBox 's Text property simply contains the text that's currently displayed in the ComboBox 's text input field and has type string .