1.添加引用
2.添加命名空間
3.查看App.config連接字符串的名字
4.拿到連接字符串
string str = ConfigurationManager.ConnectionStrings["ConnectSQL.Properties.Settings.StudentsConnectionString"].ConnectionString;
string str = ConfigurationManager.ConnectionStrings["ConnectSQL.Properties.Settings.StudentsConnectionString"].ConnectionString;
this.richTextBox2.SelectionStart=this.richTextBox2.Text.Length; this.richTextBox2.ScrollToCaret();
public partial class MyMessageBox : Window { public static void Show(string strErrorInfo) {