//删除选中课程
private void button15_Click(object sender, EventArgs e)
{
if (MessageBox.Show("确定要删除吗？", "询问", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
bool isDeleteOk = true;
CourseBusiness couBusiness = new CourseBusiness();
DataGridViewSelectedRowCollection toBeDeletedRowsCollection = this.dataGridView3.SelectedRows;
DataGridViewRow[] tobedeletedrows = new DataGridViewRow[toBeDeletedRowsCollection.Count];
toBeDeletedRowsCollection.CopyTo(tobedeletedrows, 0);
foreach (DataGridViewRow temp in tobedeletedrows)
{
if (couBusiness.deleteCourse(int.Parse(temp.Cells["cid"].Value.ToString())) == 0)
isDeleteOk = false;
}
if (isDeleteOk)
{
MessageBox.Show("删除成功！");
}
else
{
MessageBox.Show("删除出现错误，请刷新列表后重试！");
}
}
}
