angularJS结合C#怎么对sqlserver数据库中的数据进行增删改查

Posted 2023-05-07

简单的小案例即可，很急 多谢多谢

参考技术A 用到
using System.Data.SqlClient;//命名空间
SQL 查询
string connection_str=@"Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=ChatRoom;Data Source=.\sqlexpress";

string select_str="select 字段 from 表名 [where 字段=值]";//"[之间的内容]"是可选的

SqlConnection con=new SqlConnection(connection_str);//一，创建数据库连接对象
SqlCommand com=new SqlCommand(select_str,con);//二，创建数据操作对象
con.Open();//现在用的是连接操作方法，所以要先打开这个数据连接对象的连接
DataReader _dataReader = com.ExcuteReader();
while(_dataReader.Next())//遍历

string temp += dataReader["字段"].ToString()+"\r\n";

con.Close();//关闭数据库连接对象
MessageBox.Show(temp);

以上这种方法是称为连接式操作。

以下这种方法是称为非连接式操作。
using System.Data.SqlClient;//因为要用到SQL对象
using System.Data;//要用到数据集对象，如以下将要用到：DataSet对象
string connection_str=@"Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=ChatRoom;Data Source=.\sqlexpress";

string select_str="select 字段 from 表名 [where 字段=值]";//"[之间的内容]"是可选的

SqlConnection con=new SqlConnection(connection_str);//一，创建数据库连接对象
SqlDataAdapter DataAdapter=new SqlDataAdapter(select_str,con);//二，创建数据操作对象
DataSet ds=new DataSet();
DataAdapter.Fill(ds);//DataAdapter.Fill(填充对象)//函数是将除处理的select_str语句得来结果填充到指定的填充对象
string temp="";
foreact(DataRow dr in ds.Table[0].Rows)//遍历

temp+=dr["字段"].ToString();

MessageBox.Show(temp);

至少楼主说的要增删改查。

就是修改select_str字符串就行了。

select(查询):"Select 字段 from 表名 [where 条件]";
update(更新):"Update 列名 set 字段=值 [where 条件]";
insert(插入):"Insert [into] 表名 Values(字段[,字段,...,...]) [where 条件]";
delete(删除):"delect from 表名 [where 条件]";

当然，除了select(查询)是有返回数据，其它update(更新),insert(插入),delete(删除)都只是返回操作状态值。追问

我的意思不是这个，是前台部分使用angularJS进行操作，您知道怎么写吗

C# 对SqlServer数据库增删改查

http://www.worlduc.com/blog2012.aspx?bid=730767

用C#sqlserver实现增删改查

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.Sql;
using System.Data.SqlClient;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {

            while (true)
            {
                SqlConnection con = new SqlConnection();
                con.ConnectionString = "server=505-03;database=ttt;user=sa;pwd=123";
                con.Open();
                SqlCommand cmd = new SqlCommand();
                cmd.Connection = con;
                string sql="";

                Console.WriteLine("增加请输入1；删除请输入2；修改请输入3；查找请输入4");
                int i = Convert.ToInt32(Console.ReadLine());
                string str = "";
                switch (i)
                {
                    case 1:
                        sql = "insert into ";
                        Console.WriteLine("请输入你要修改的表");
                        str = Console.ReadLine();
                        sql += str + "(";
                        Console.WriteLine("请输入你要修改的列名，用逗号隔开");
                        str = Console.ReadLine();
                        sql += str + ")";
                        Console.WriteLine("请输入相应的数据，用逗号隔开");
                        str = Console.ReadLine();
                        sql += " values (" + str+")";
                        break;
                    case 2:
                        sql = "DELETE FROM ";
                        Console.WriteLine("请输入表名");
                        str = Console.ReadLine();
                        sql += str;
                        Console.WriteLine("请输入删除的条件");
                        str = Console.ReadLine();
                        sql += " where " + str;
                        break;
                    case 3:
                        sql = "UPDATE ";
                        Console.WriteLine("请输入表名");
                        str = Console.ReadLine();
                        sql += str + " set ";
                        Console.WriteLine("请输入要修改的数据，如money=0,多个用逗号隔开");
                        str = Console.ReadLine();
                        sql += str;
                        Console.WriteLine("请输入要修改的条件");
                        str = Console.ReadLine();
                        sql += " where " + str;
                        break;
                    case 4:
                        sql = "select ";
                        Console.WriteLine("请输入你要查询的列名，多个用逗号隔开");
                        str = Console.ReadLine();
                        sql += str;
                        Console.WriteLine("请输入你要查询的表名，多个用逗号隔开");
                        str = Console.ReadLine();
                        sql += " from " + str;
                        break;

                }
                cmd.CommandText = sql;
                cmd.CommandType = CommandType.Text;
                cmd.ExecuteNonQuery();
            }

        }
    }
}