Question

我有一个asp.net项目。这是我的数据库的创建脚本;

    USE [asgdb01]
GO

/****** Object:  Table [dbo].[info]    Script Date: 01/02/2013 03:32:37 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

SET ANSI_PADDING ON
GO

CREATE TABLE [dbo].[info](
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [NAME] [varchar](250) NULL,
    [WORKTYPE] [varchar](250) NULL,
    [MONDAY] [int] NULL,
    [TUESDAY] [int] NULL,
    [WEDNESDAY] [int] NULL,
    [THURSDAY] [int] NULL,
    [SATURDAY] [int] NULL,
    [CUMARTESI] [int] NULL,
    [SUNDAY] [int] NULL,
    [TOTAL] [int] NULL,
    [DATE] [date] NULL,
    [RAWTIME] [int] NULL,
    [DAY] [int] NULL,
    [PENALTY1] [int] NULL,
    [PENALTY2] [int] NULL,
    [PENALTY_MINS] [int] NULL,
    [CORRECTION] [int] NULL,
    [CORRECTION_HOURS] [int] NULL,
    [TOTAL_RAWTIME] [int] NULL,
    [ACCUMULATIVE] [int] NULL,
 CONSTRAINT [PK_info] PRIMARY KEY CLUSTERED 
(
    [ID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

SET ANSI_PADDING OFF
GO

你可以很容易地理解我想要做什么。这是此页面的.cs代码;

protected void Button1_Click(object sender, EventArgs e)
    {
        SqlConnection conn;
        SqlCommand cmd = new SqlCommand();
        string strSQL = "UPDATE info (ID,DAYS,PENALTY1,PENALTY2,CORRECTION,DATE) Values (@ID,@DAYS,@PENALTY1,@PENALTY2,@CORRECTION,@DATE)";
        string bag_str = WebConfigurationManager.ConnectionStrings["asgdb01ConnectionString"].ConnectionString;
        conn = new SqlConnection(bag_str);
        conn.Open();
        cmd.Connection = conn;
        cmd.CommandText = strSQL;
        cmd.Parameters.Add(new SqlParameter("@ID", Int32.Parse(DropDownList1.SelectedItem.Value)));
        cmd.Parameters.Add(new SqlParameter("@DATE", CalendarExtender1.SelectedDate));
        cmd.Parameters.Add(new SqlParameter("@DAYS", Int32.Parse(TextBox3.Text)));
        cmd.Parameters.Add(new SqlParameter("@PENALTY1", Int32.Parse(TextBox4.Text)));
        cmd.Parameters.Add(new SqlParameter("@PENALTY2", Int32.Parse(TextBox5.Text)));
        cmd.Parameters.Add(new SqlParameter("@CORRECTION", Int32.Parse(TextBox6.Text)));


        int i = cmd.ExecuteNonQuery();
        conn.Close();
        if (i > 0)
            Response.Write("Success ! ");
        else
            Response.Write("Error ! Try Again");
    }

正如您从代码中看到的，我将从日历扩展器中选择2个日期，我将从下拉列表中选择员工，我将在我的文本框中输入值，然后我将点击“计算”按钮，我将更新所选我的数据库中的行。

我需要你帮助我的朋友们。用四只眼睛等你的答案。谢谢！

Answer 1

您的UPDATE语法错误。它应该是这样的

string strSQL = @"UPDATE info 
                  SET DAYS = @DAYS,
                      PENALTY1 = @PENALTY1,
                      PENALTY2 = @PENALTY2,
                      CORRECTION = @CORRECTION,
                      DATE = @DATE
                WHERE ID = @ID";

其他问题

你需要

正确处置对象，使用using语句
正确捕获激活，使用tr-catch阻止

例如

string strSQL = @"UPDATE info 
                  SET DAYS = @DAYS,
                      PENALTY1 = @PENALTY1,
                      PENALTY2 = @PENALTY2,
                      CORRECTION = @CORRECTION,
                      DATE = @DATE
                WHERE ID = @ID";
string connStr = WebConfigurationManager.ConnectionStrings["asgdb01ConnectionString"].ConnectionString;
using (SqlConnection conn = new SqlConnection(connStr))
{
    using (SqlCommand comm = new SqlCommand())
    {
        comm.Connection = conn;
        comm.CommandText = strSQL;
        comm.CommandType = CommandType.Text;
        comm.Parameters.Add(new SqlParameter("@ID", Int32.Parse(DropDownList1.SelectedItem.Value)));
        comm.Parameters.Add(new SqlParameter("@DATE", CalendarExtender1.SelectedDate));
        comm.Parameters.Add(new SqlParameter("@DAYS", Int32.Parse(TextBox3.Text)));
        comm.Parameters.Add(new SqlParameter("@PENALTY1", Int32.Parse(TextBox4.Text)));
        comm.Parameters.Add(new SqlParameter("@PENALTY2", Int32.Parse(TextBox5.Text)));
        comm.Parameters.Add(new SqlParameter("@CORRECTION", Int32.Parse(TextBox6.Text)));
        try
        {
            conn.Open();
            int i = comm.ExecuteNonQuery();
            if (i > 0)
            {
                Response.Write("Success ! ");
            }
            else
            {
                Response.Write("No record was updated ");
            }
        }
        catch(SqlException ex)
        {
            Response.Write(ex.ToString());
        }
    }
}

用条件更新数据库

1 个答案: