Question

错误是：

System.Data.dll中发生未处理的“System.Data.SqlClient.SqlException”类型异常
附加信息：关键字“用户”附近的语法不正确。

代码是：

using System;  
using System.Collections.Generic;  
using System.ComponentModel;  
using System.Data;  
using System.Drawing;  
using System.Linq;  
using System.Text;  
using System.Windows.Forms;  
using System.Data.SqlClient;  

namespace WindowsFormsApplication1  
{  
    public partial class Form1 : Form  
    {  
        SqlConnection conn;  
        SqlDataAdapter GameDA;  
        SqlDataAdapter DetailDA;  
        DataSet DetailDS;  
        SqlCommandBuilder cmdBuilder;  
        SqlDataAdapter UserDA;  
        SqlDataAdapter AdministratorDA;  
        SqlDataAdapter OrderDA;  
        DataSet OrderDS;  
        SqlCommandBuilder cmdBuilder2;  

        public Form1()
        {
            InitializeComponent();
            conn = new SqlConnection("Data Source=HOME-AC284121FE\\SQLEXPRESS;Initial Catalog=GameShop;Integrated Security=SSPI;");
            SqlCommand command1 = new SqlCommand("SELECT * FROM Game", conn);
            GameDA = new SqlDataAdapter(command1);
            SqlCommand command2 = new SqlCommand("SELECT * FROM Detail WHERE GameID = @GameID", conn);
            command2.Parameters.Add(new SqlParameter("@GameID", SqlDbType.Int));
            DetailDA = new SqlDataAdapter(command2);
            SqlCommand command3 = new SqlCommand("SELECT * FROM Administrator", conn);
            AdministratorDA = new SqlDataAdapter(command3);
            SqlCommand command4 = new SqlCommand("SELECT * FROM User", conn);
            UserDA = new SqlDataAdapter(command4);
            SqlCommand command5 = new SqlCommand("SELECT * FROM Order WHERE UserID = @UserID", conn);
            command5.Parameters.Add(new SqlParameter("@UserID", SqlDbType.Int));
            OrderDA = new SqlDataAdapter(command5);
            cmdBuilder2 = new SqlCommandBuilder(OrderDA);
            cmdBuilder = new SqlCommandBuilder(DetailDA);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DetailDS = new DataSet();
            OrderDS = new DataSet();

            GameDA.Fill(DetailDS, "Game");
            **UserDA.Fill(OrderDS, "User"); // <-- Error**
            AdministratorDA.Fill(OrderDS, "Administrator");

            comboBoxGame.DisplayMember = "Name";
            comboBoxGame.ValueMember = "GameID";
            comboBoxGame.DataSource = DetailDS.Tables["Game"];

            dataGridView.DataSource = DetailDS.Tables["Detail"];
            dataGridView.Columns["GameID"].Visible = false;
            dataGridView.Columns["DetailID"].Visible = false;


        }

        private void comboBoxGame_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (comboBoxGame.SelectedValue != null)
                if (DetailDS.Tables.Contains("Detail"))
                {
                    DetailDS.Tables["Detail"].Clear();
                }
            DetailDA.SelectCommand.Parameters[0].Value = comboBoxGame.SelectedValue;
            DetailDA.Fill(DetailDS, "Detail");
        }

        private void buttonExit_Click(object sender, EventArgs e)
        {
            this.Close();
        }

    }
}

Answer 1

User是SQL Server中的内置函数。您需要用方括号括起名称：[User]。这适用于碰巧与关键字，保留字或内置名称冲突的所有表名和其他用户定义的名称，因此我怀疑您还需要编写[Order]，因为ORDER是一个SQL关键字。

Answer 2

“用户”是SQL Server中的reserved word，因此您必须使用delimited identifier来引用您的表格。尝试

SqlCommand command4 = new SqlCommand("SELECT * FROM [User]", conn);

而是......或者将表重命名为未保留的内容。

（我还强烈建议您保持数据访问权限不受UI代码的影响，正确处理连接等......但这是另一回事。）

关键字“用户”附近的语法不正确

2 个答案: