Marcus

winform窗体上有一个button 给button一个点击事件1、System.Diagnostics.Process.Start("http://www.google.com");如果想要兼容IE浏览器的话 System.Diagnostics.Process.Start("iexplore.exe","http://www.google.com");

dataGridView1.CurrentRow.Cells[0].Value;

using (StudentDbEntities db=new StudentDbEntities ()) { comboBox1.DataSource = db.grade.Distinct().ToList(); comboBox1.DisplayMember = "gradename";//需要显示的列 comboBox1.ValueMember =..