bookreturnform.aspx.cs

基于C#和MYSQL的图书管理系统

//文件名：BookReturnForm.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.Data.SqlClient;
public partial class BorrowManage_BookReturnForm : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string MyForbidString = Session["MyForbid"].ToString();
        if (MyForbidString.IndexOf("C2") > 1)
        {
            Server.Transfer("~/SystemManage/AllErrorHelp.aspx");
        }
        this.Button2.OnClientClick ="return confirm('请检查图书归还信息是否正确，一旦保存就无法修改，是否继续？')";
        this.Button3.OnClientClick ="return confirm('请检查图书挂失信息是否正确，一旦保存就无法修改，是否继续？')";
    }
    protected void Button2_Click(object sender, EventArgs e)
    {//归还图书
        if (this.TextBox2.Text.Length < 1)
        {
            this.Page.RegisterStartupScript("msgOnlyAlert", "<script>alert('请输入读者编号！');</script>");
            return;
        }
        if (this.TextBox3.Text.Length < 1)
        {
            this.Page.RegisterStartupScript("msgOnlyAlert", "<script>alert('请选择将要归还的图书！');</script>");           
            return;
        }
        DateTime MyReturnDate = DateTime.Parse(this.TextBox7.Text);
        TimeSpan MySpanReturn = MyReturnDate.Subtract(DateTime.Parse(this.TextBox5.Text));
        if (MySpanReturn.Days < 0)
        {
            this.Page.RegisterStartupScript("msgOnlyAlert", "<script>alert('归还日期不正确！');</script>");           
            return;
        }
        String MySQLConnectionString = ConfigurationManager.ConnectionStrings["MyBooksDBConnectionString"].ConnectionString;
        SqlConnection MyConnection = new SqlConnection(MySQLConnectionString);
        MyConnection.Open();
        string MySQL = "Update 馆藏图书 Set 出借数量=出借数量-1 WHERE 图书书号='" + this.TextBox4.Text + "';";
        MySQL += "Update 借阅管理 Set 归还日期='" + this.TextBox7.Text + "' WHERE 图书书号='" + this.TextBox4.Text  + "' AND 读者编号='" + this.TextBox1.Text + "' AND 归还日期 IS NULL";
        SqlCommand MyCommand = MyConnection.CreateCommand();
        MyCommand.CommandText = MySQL;
        MyCommand.ExecuteNonQuery();
        if (MyConnection.State == ConnectionState.Open)
        {
            MyConnection.Close();
        }
        GridView1.DataBind();
        this.TextBox2.Text = "";
        this.TextBox3.Text = "";
    }
    protected void Button3_Click(object sender, EventArgs e)
    {//挂失图书
        if (this.TextBox2.Text.Length < 1)
        {
            this.Page.RegisterStartupScript("msgOnlyAlert", "<script>alert('请输入读者编号！');</script>");
            return;
        }
        if (this.TextBox3.Text.Length < 1)
        {
            this.Page.RegisterStartupScript("msgOnlyAlert", "<script>alert('请选择将要挂失的图书！');</script>");
            return;
        }
        DateTime MyReturnDate = DateTime.Parse(this.TextBox7.Text);
        TimeSpan MySpanReturn = MyReturnDate.Subtract(DateTime.Parse(this.TextBox5.Text));
        if (MySpanReturn.Days < 0)
        {
            this.Page.RegisterStartupScript("msgOnlyAlert", "<script>alert('挂失日期不正确！');</script>");
            return;
        }
        String MySQLConnectionString = ConfigurationManager.ConnectionStrings["MyBooksDBConnectionString"].ConnectionString;
        SqlConnection MyConnection = new SqlConnection(MySQLConnectionString);
        MyConnection.Open();
        string MySQL = "Update 馆藏图书 Set 出借数量=出借数量-1,遗失数量=遗失数量+1 WHERE 图书书号='" + this.TextBox4.Text + "';";
        MySQL += "Update 借阅管理 Set 遗失图书='是' WHERE 图书书号='" + this.TextBox4.Text + "' AND 读者编号='" + this.TextBox1.Text + "' AND 遗失图书 IS NULL";
        SqlCommand MyCommand = MyConnection.CreateCommand();
        MyCommand.CommandText = MySQL;
        MyCommand.ExecuteNonQuery();
        if (MyConnection.State == ConnectionState.Open)
        {
            MyConnection.Close();
        }
        GridView1.DataBind();
        this.TextBox2.Text = "";
        this.TextBox3.Text = "";
    }
    protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
    {//选择图书
        this.TextBox2.Text = this.GridView1.SelectedRow.Cells[1].Text.ToString();
        this.TextBox3.Text = this.GridView1.SelectedRow.Cells[3].Text.ToString();
        this.TextBox4.Text = this.GridView1.SelectedRow.Cells[2].Text.ToString();
        this.TextBox5.Text = this.GridView1.SelectedRow.Cells[4].Text.ToString();
        this.TextBox6.Text = this.GridView1.SelectedRow.Cells[5].Text.ToString();
    }
}