Question

当我运行代码时，它将运行。出现登录和注册表格。但是在单击注册按钮后输入详细信息后，它会显示错误

“ system.data.dll中发生类型'system.data.sqlclient.sqlexception'的未处理异常” 并突出显示 con 和 con.open（）

下面给出了编码

命名空间MovieBookingSystemCSharp { 公共部分课程注册：表格 { 公共注册 { InitializeComponent（）; }

    private void button1_Click(object sender, EventArgs e)
    {
        SqlConnection **con** = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\dell\Documents\Visual Studio 2015\Projects\MovieBookingSystemCSharp\MovieBookingSystemCSharp\movie.mdf;Integrated Security=True");
        **con.Open();**

        try
        {
            string str = "INSERT INTO user1(name,mobile,email,pass) VALUES('" + textBox1.Text + "','" + TextBox2.Text + "','" + TextBox3.Text + "','" + TextBox4.Text + "'); ";

            SqlCommand cmd = new SqlCommand(str, con);
            cmd.ExecuteNonQuery();

            //-------------------------------------------//

            string str1 = "select max(Id) from user1;";

            SqlCommand cmd1 = new SqlCommand(str1, con);
            SqlDataReader dr = cmd1.ExecuteReader();
            if (dr.Read())
            {
                MessageBox.Show("New User Registered Successfully..");
                Form1 obj = new Form1();
                obj.ShowDialog();
                this.Hide();
            }
        }
        catch (SqlException excep)
        {
            MessageBox.Show(excep.Message);
        }
        con.Close();
    }

    private void button2_Click(object sender, EventArgs e)
    {
        textBox1.Text = "";
        TextBox2.Text = "";
        TextBox3.Text = "";
        TextBox4.Text = "";

    }
}

}

Answer 1

尝试修改“ AttachDbFilename”属性，如下所示，该路径中没有空格。

SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\testuser1\Documents\vs2015\Projects\MovieBookingSystemCSharp\MovieBookingSystemCSharp\movie.mdf;Integrated Security=True");

如何修复“ System.Data.dll中发生类型'System.Data.SqlClient.SqlException'的未处理的异常”

1 个答案: