Failed to convert parameter value from a String to a Int32.

int ist = EAdapter.Insert(txtclgname.Text,

txtErlno.Text, drpsem.SelectedItem.Text, drpEdu.SelectedItem.Text, drpBranch.SelectedItem.Text,

drpPassyear.SelectedItem.Text, float.Parse(txtCGPA.Text), drpreqskill.SelectedItem.Text, txtExSkill.Text, resume);