Question

I have this code:

typeof(ComboBox).GetProperty("SelectedItem").SetValue("comboBox1", "", null);

It is not working. Here is the error:

“Object does not match target type”

What is wrong?

Update:

I have the name of my object (comboBox in string. like:

string []s = new s[3];
s[0]="comboBox0"; 
s[1]="comboBox1"; 
s[2]="comboBox2"; 

I want to set a value to the property SelectedItem to my comboBox s[i]. How can I do it?

Answer 1

SetValue need to have ComboBox object, not string “comboBox1”. I believe you have a ComboxBox object in your application, assume:

ComboBox comboBox1 = ....;

So you can call:

typeof(ComboBox).GetProperty("SelectedItem")
                .SetValue(comboBox1, "", null);

If you use .NET 4.5, you can get rid of the last input:

typeof(ComboBox).GetProperty("SelectedItem")
                .SetValue(comboBox1, "");

Edit: based on your comment, you don’t need to use reflection, below is you can get combox1 if only knowing the name:

var comboBox1 = Controls.OfType<ComboBox>()
                      .SingleOrDefault(c => c.Name == "Combobox1");

comboBox1.SelectedItem = "";