a_students.aspx.cs

实验课预约系统。采用.net+access数据库实现。 管理员对学生教师有管理功能

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;

public partial class A_Students : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Admin aAdmin = (Admin)this.Master;
            aAdmin.ManageTitle = "学生管理";
            aAdmin.MenuSelectedValue = "StudentManage";
            this.fsItem.Visible = false;
            Initialize();
            this.btnDel.Attributes.Add("onclick", "return  confirm('您真的要删除吗？');");
            BindDisplayList(0,"");//返回所有学生
            this.lbMsg.Text = "";
        }

    }


    #region 属性
    static int m_ColID = 0;
    public string CurrentClass 
    {
        get
        {
            if (0 == this.ddlClass.SelectedIndex)
            {
                return "全部";
            }
            return this.ddlClass.SelectedValue;
        }
    }
    #endregion


    #region 操作函数
    /// <summary>
    /// 返回所有的实验项目批次
    /// </summary>
    /// <param name="pageIndex"></param>
    /// <param name="sortExpression">要排序的字段</param>
    private void BindDisplayList(int pageIndex, string sortExpression)
    {
        lbMsg.Text = "";
        StudentsList.Columns[m_ColID].Visible = true;
        StudentsList.SelectedIndex = -1;

        DataTable dt = SingleInitials.DbAccess.GetStudentsList(CurrentClass).Tables[0];//返回所有列表

        if (sortExpression == null || sortExpression == string.Empty)
        {
            JKLib.Web.GridViewOperation.BindPagingGridView(StudentsList, dt.DefaultView, pageIndex);
        }
        else
        {
            JKLib.Web.GridViewOperation.BindPagingGridView(StudentsList, dt.DefaultView, pageIndex, sortExpression, true, JKLib.Web.GridViewOperation.BindPagingGridViewType.Sorting);
        }
        StudentsList.Columns[m_ColID].Visible = false;
    }

    private void Initialize()
    {
        UIControls.BindClassesDDL(this.ddlClass);
        UIControls.BindClassesEDD(this.eddClasses);
    }

    private void DisplayItem(string mID)
    {
        fsItem.Visible = true;
        if (mID == "-1")
        {
            btnDel.Visible = false;
            legendItem.InnerText = "新增";
            NewItem();
        }
        else
        {
            btnDel.Visible = true;
            legendItem.InnerText = "修改";
            LoadItem(int.Parse(mID));
        }
    }
   
    private bool CheckInput(ref string strError)
    {
        strError = "";
        bool retValue = true;
        if (tbxName.Text == "")
        {
            strError += "请输入姓名;";
            retValue = false;
        }

        if (eddClasses.Text　==　"")
        {
            strError += "请选择或输入班级;";
            retValue = false;
        }

        if (tbxStudyID.Text　==　"")
        {
            strError += "请输入学号;";
            retValue = false;
        }
        if (tbxPassword.Text == "")
        {
            strError += "请输入密码;";
            retValue = false;
        }
        if (this.tbxKeyID.Text == "-1")//添加学生
        {
            if (SingleInitials.DbAccess.GetIsHasStudyID(tbxStudyID.Text))
            {
                strError += "学号已存在;";
                retValue = false;
            }
        }
        else//修改学生
        {
            ExpReserve.Student aStudent = SingleInitials.DbAccess.GetAStudent(long.Parse(this.tbxKeyID.Text));
            if (tbxStudyID.Text != aStudent.StudyID)//学号有发生改变才判断
            {
                if (SingleInitials.DbAccess.GetIsHasStudyID(tbxStudyID.Text))
                {
                    strError += "学号已存在;";
                    retValue = false;
                }
            }
        }
        return retValue;

    }
    private bool Save()
    {
        string errStr = "";
        if (!CheckInput(ref errStr))
        {
            lbMsg.Text = errStr;
            return false;
        }

        try
        {
            if (this.tbxKeyID.Text == "-1")
            {
                //添加
                ExpReserve.Student aStudent = new ExpReserve.Student();
                aStudent.Name = this.tbxName.Text;
                aStudent.Class = this.eddClasses.Text;
                aStudent.Sex = this.ddlSex.Text;
                aStudent.StudyID = this.tbxStudyID.Text;
                aStudent.Password = this.tbxPassword.Text;
                return SingleInitials.DbAccess.AddAStudent(aStudent);
            }
            else
            {
                //修改
                ExpReserve.Student aStudent = new ExpReserve.Student();
                aStudent.Name = this.tbxName.Text;
                aStudent.Class = this.eddClasses.Text;
                aStudent.Sex = this.ddlSex.Text;
                aStudent.StudyID = this.tbxStudyID.Text;
                aStudent.Password = this.tbxPassword.Text;
                aStudent.ID = long.Parse(this.tbxKeyID.Text);
                return SingleInitials.DbAccess.EditAStudent(aStudent);
            }
        }
        catch (Exception ex)
        {
            lbMsg.Text = ex.Message;
            return false;

        }
        
    }


    private void NewItem()
    {
        // 清空编辑界面 
        tbxName.Text = "";
        if (this.CurrentClass != "全部")
        {
            eddClasses.Text = this.CurrentClass;
        }
        else
        {
            eddClasses.Text = "";
        }
        
        ddlSex.SelectedIndex = 0;
        tbxStudyID.Text = "";
        if (null == tbxPassword.Attributes["value"])
        {
            tbxPassword.Attributes.Add("value", "");
        }
        else
        {
            tbxPassword.Attributes["value"] = "";
        }
    }

    private void LoadItem(int mID)
    {

        ExpReserve.Student aStudent = SingleInitials.DbAccess.GetAStudent(mID);
        tbxKeyID.Text = aStudent.ID.ToString();//记录当前记录ID
        
        tbxName.Text = aStudent.Name;
        eddClasses.Text = aStudent.Class;
        ddlSex.SelectedValue = aStudent.Sex;
        tbxStudyID.Text = aStudent.StudyID;
        if (null == tbxPassword.Attributes["value"])
        {
            tbxPassword.Attributes.Add("value", aStudent.Password);
        }
        else
        {
            tbxPassword.Attributes["value"] = aStudent.Password;
        }

    }

    #endregion


    #region 表格处理
    protected void BatchList_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        BindDisplayList(e.NewPageIndex, null);
    }
    protected void BatchList_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "StudentEdit")
        {
            StudentsList.SelectedIndex = int.Parse(e.CommandArgument.ToString());
            string theID = StudentsList.Rows[int.Parse(e.CommandArgument.ToString())].Cells[m_ColID].Text;
            tbxKeyID.Text = theID;
            DisplayItem(theID);
        }
    }
    protected void BatchList_RowCreated(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.Pager)
            JKLib.Web.GridViewOperation.GridRowCreated(sender, e);
    }
    protected void BatchList_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        ////Button   btn   =   (Button)e.Row.Cells[2].Controls[0]; 
        ////btn.Attributes.Add("onclick","return   confirm('您真的要删除吗？');");
        //LinkButton btn = (LinkButton)e.Row.Cells[2].Controls[0]; 
        //btn.Attributes.Add("onclick", "return   confirm('您真的要删除吗？');");    
    }
    protected void BatchList_Sorting(object sender, GridViewSortEventArgs e)
    {
        BindDisplayList(StudentsList.PageIndex, e.SortExpression);
    }
    #endregion


    #region 列表事件处理
    protected void ddlClass_SelectedIndexChanged(object sender, EventArgs e)
    {
        this.BindDisplayList(0, "");
        this.fsItem.Visible = false;
    }
    #endregion


    #region 按钮事件
    protected void btnNewBatch_Click(object sender, EventArgs e)
    {
        this.tbxKeyID.Text = "-1";
        DisplayItem(tbxKeyID.Text);
    }
    protected void btnDel_Click(object sender, EventArgs e)
    {
        try
        {
            int lastPageIndex = this.StudentsList.PageIndex;

            SingleInitials.DbAccess.DelAStudent(long.Parse(this.tbxKeyID.Text));
            string lastClassStr = this.CurrentClass;
            Initialize();//更新班级列表
            if (this.ddlClass.Items.FindByText(lastClassStr) != null)
            {
                this.ddlClass.SelectedValue = lastClassStr;
            }
            this.BindDisplayList(0, "");//更新列表
            if (lastPageIndex < this.StudentsList.PageCount)
            {
                this.BindDisplayList(lastPageIndex, "");//更新列表
            }
            this.fsItem.Visible = false;
        }
        catch (Exception ex)
        {
            lbMsg.Text = ex.Message;
        }
    }
    protected void btn_Save_Click(object sender, EventArgs e)
    {
        if (Save())
        {
            int lastPageIndex = this.StudentsList.PageIndex;

            string lastClassStr = this.eddClasses.Text;
            Initialize();//更新班级列表
            if (this.ddlClass.Items.FindByText(lastClassStr) != null)
            {
                this.ddlClass.SelectedValue = lastClassStr;
            }
            if ("-1" == this.tbxKeyID.Text)//添加
            {
                this.BindDisplayList(0, "");//更新列表
                //this.BindDisplayList(this.StudentsList.PageCount - 1, "");//更新列表
            }
            else//修改
            {
                this.BindDisplayList(lastPageIndex, "");//更新列表
            }
            this.fsItem.Visible = false;
        }
    }
    #endregion

    
}