''附近的语法不正确”，需要研究帮助[关闭]

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关闭。这个问题是off-topic。它当前不接受答案。

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是否要改善此问题？ Update the question，因此堆栈溢出为on-topic。

关闭8秒前。

SqlCommand UpdateCmd = new SqlCommand("Update StudentTbl SET Firstname= @Firstname, Lastname= @Lastname, Birthday= @Birthday, Strand= @Strand, Section= @Section WHERE SID = @ID)", ConClass.con);


UpdateCmd.Parameters.AddWithValue("@ID", textBox1.Text);

UpdateCmd.Parameters.AddWithValue("@Firstname", textBox2.Text);
            UpdateCmd.Parameters.AddWithValue("@Lastname", textBox3.Text);

UpdateCmd.Parameters.AddWithValue("@Birthday", textBox4.Text);

UpdateCmd.Parameters.AddWithValue("@Strand", comboBox1.Text);
            UpdateCmd.Parameters.AddWithValue("@Section", comboBox2.Text);



            ConClass.con.Open();
            UpdateCmd.ExecuteNonQuery();
            ConClass.con.Close();
            MessageBox.Show("Information was updated successfully!");
            textBox1.Text = "";
            textBox2.Text = "";
            textBox3.Text = "";
            textBox4.Text = "";
            comboBox1.Text = "Select Strand";
            comboBox2.Text = "Select Section";


            Ref_Grid();

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