Question

My code goes like this for simple practise problem which i am trying to build. I come across

Invalid Cast Exception. Specified Cast is not valid.

public Form1()
{
      Combobox1.Datasource = foo.bar.dataset.tables[0];
      Combobox1.DisplayMember = "Name";
      Combobox1.ValueMember = "ID";
 }

 private void ComboBox1_SelectedIndexChanged(object sender, EventArgs e)
 {
      NewClass P2 = new NewClass;
      P2.Filter.Id = (long)Combobox1.SelectedValue;
 }

Can anyone tell me why is this happening and how to go about solving it even though I have typecasted Combobox1.SelectedValue object?

Answer 1

Maybe this will help:

P2.Filter.Id = Convert.ToInt64(Combobox1.SelectedValue);

According to your comment this might help:

P2.Filter.Id = Convert.ToInt64((Combobox1.SelectedValue as DataRowView).Item[0]);