步步为营 .NET三层架构解析八、UI的设计(GridView的设计及其分页)

这次我们设计员工操作列表Custom.aspx和部门操作列表Departmant.aspx的设计.以及如何设计GridView的分页功能.

先调用BLL设计方法获取数据的List列表,转换成PagedDataSource,再设置PagedDataSource属性来实现分页功能.

先看Custom.aspx的设计:

<div style="text-align: center">
        <asp:GridView ID="gvCustom" DataKeyNames="ID"
            OnRowDeleting="GridView_RowDeleting" runat="server" CellPadding="4"
            ForeColor="#333333" GridLines="None" HorizontalAlign="Center" Width="98%"
            CellSpacing="1" AutoGenerateColumns="False">
            <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <RowStyle BackColor="#EFF3FB" HorizontalAlign="Center" />
            <EditRowStyle BackColor="#2461BF" Font-Italic="True" HorizontalAlign="Center" VerticalAlign="Middle" />
            <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
            <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
            <HeaderStyle BackColor="Silver" Font-Bold="True" ForeColor="White" Font-Size="12px" HorizontalAlign="Center" />
            <AlternatingRowStyle BackColor="White" />
            <Columns>
                <asp:BoundField DataField="id" HeaderText="ID" />
                <asp:BoundField DataField="ename" HeaderText="帐户名" />
                <asp:BoundField DataField="cname" HeaderText="姓名" />
                <asp:BoundField DataField="age" HeaderText="年龄" />
                <asp:BoundField DataField="departname" HeaderText="部门" />
                <asp:HyperLinkField DataTextField="id" DataTextFormatString="修改"
                    HeaderText="修改" DataNavigateUrlFields="id" DataNavigateUrlFormatString="Updatecustom.aspx?id={0}" />
                <asp:TemplateField HeaderText="删除">
                    <ItemTemplate>
                        <asp:LinkButton ID="LinkButton2" OnClientClick="return confirm('您确认删除该记录吗?');" runat="server" CommandName="Delete" Font-Names="宋体" Font-Strikeout="False" Font-Underline="False" ForeColor="Black">删除</asp:LinkButton>          
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
        <asp:Button ID="btnAddUser" runat="server" onclick="btnAddUser_Click"
            Text="添加用户" />
        当前页码为:<asp:Label ID="labPage" runat="server" Text="1"></asp:Label> 
        总页码为:<asp:Label ID="labBackPage" runat="server"></asp:Label>
            
        <asp:LinkButton ID="lnkbtnOne" runat="server" OnClick="lnkbtnOne_Click">第一页</asp:LinkButton>
        <asp:LinkButton ID="lnkbtnUp" runat="server" OnClick="lnkbtnUp_Click">上一页</asp:LinkButton>
         <asp:LinkButton ID="lnkbtnNext" runat="server" OnClick="lnkbtnNext_Click">下一页</asp:LinkButton>
        <asp:LinkButton ID="lnkbtnBack" runat="server" OnClick="lnkbtnBack_Click">最后一页</asp:LinkButton>
    </div>

现来看下Custom.aspx.cs的设计:

记在先加上:

using BLL;

using Model;

然后再:

public partial class Custom : PageBase
{
    protected void Page_Load(object sender, EventArgs e)
    {
 
        if (!Page.IsPostBack)
        {
            //验证权限
            IsAdmin();
            BinData();
        }
 
    }
    /// <summary>
    /// 绑定数据
    /// </summary>
    private void BinData()
    {
        customSystem CustomSystem = new customSystem();
        List<custom> Customlist = new List<custom>();
        //调用BLL方法获取列表
        Customlist = CustomSystem.GetCustom();
        int curpage = Convert.ToInt32(this.labPage.Text);
        //设计分页
        PagedDataSource ps = new PagedDataSource();
        ps.DataSource = Customlist;
        ps.AllowPaging = true;
        //设置页面的条数
        ps.PageSize = 16;
        ps.CurrentPageIndex = curpage - 1;
        this.lnkbtnUp.Enabled = true;
        this.lnkbtnNext.Enabled = true;
        this.lnkbtnBack.Enabled = true;
        this.lnkbtnOne.Enabled = true;
        if (curpage == 1)
        {
            this.lnkbtnOne.Enabled = false;
            this.lnkbtnUp.Enabled = false;
 
        }
        if (curpage == ps.PageCount)
        {
            this.lnkbtnNext.Enabled = false;
            this.lnkbtnBack.Enabled = false;
 
        }
        this.labBackPage.Text = Convert.ToString(ps.PageCount);
        //绑定数据源
        gvCustom.DataSource = ps;
        gvCustom.DataBind();
    }
    /// <summary>
    ///  删除一条数据
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void GridView_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        int nid = Int32.Parse(gvCustom.DataKeys[e.RowIndex].Value.ToString());
        customSystem CustomSystem = new customSystem();
        CustomSystem.Deletecustom(nid);
        BinData();
    }
    /// <summary>
    ///  第一页
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void lnkbtnOne_Click(object sender, EventArgs e)
    {
        this.labPage.Text = "1";
        BinData();
    }
    /// <summary>
    /// 上一页
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void lnkbtnUp_Click(object sender, EventArgs e)
    {
        this.labPage.Text = Convert.ToString(Convert.ToInt32(this.labPage.Text) - 1);
        BinData();
    }
    /// <summary>
    /// 下一页
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void lnkbtnNext_Click(object sender, EventArgs e)
    {
        this.labPage.Text = Convert.ToString(Convert.ToInt32(this.labPage.Text) + 1);
        BinData();
    }
    /// <summary>
    /// 最后一页
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void lnkbtnBack_Click(object sender, EventArgs e)
    {
        this.labPage.Text = this.labBackPage.Text;
        BinData();
 
    }
    /// <summary>
    /// 跳转到增加页面
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnAddUser_Click(object sender, EventArgs e)
    {
        Response.Redirect("Register.aspx");
    }
}

再来看下Departmant.aspx的设计:

<div style="text-align: center">
       <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4"
           CellSpacing="1" DataKeyNames="ID" ForeColor="#333333" GridLines="None" HorizontalAlign="Center"
           OnRowDeleting="GridView_RowDeleting" Width="98%">
           <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
           <RowStyle BackColor="#EFF3FB" HorizontalAlign="Center" />
           <EditRowStyle BackColor="#2461BF" Font-Italic="True" HorizontalAlign="Center" VerticalAlign="Middle" />
           <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
           <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
           <HeaderStyle BackColor="Silver" Font-Bold="True" Font-Size="12px" ForeColor="White"
               HorizontalAlign="Center" />
           <AlternatingRowStyle BackColor="White" />
           <Columns>
               <asp:BoundField DataField="id" HeaderText="ID" />
               <asp:BoundField DataField="departname" HeaderText="部门名称" />
               <asp:BoundField DataField="description" HeaderText="部门描述" />
               <asp:HyperLinkField DataNavigateUrlFields="id" DataNavigateUrlFormatString="Updatedepart.aspx?id={0}"
                   DataTextField="id" DataTextFormatString="修改" HeaderText="修改" />
               <asp:TemplateField HeaderText="删除">
                   <ItemTemplate>
                       <asp:LinkButton ID="LinkButton2" runat="server" CommandName="Delete" Font-Names="宋体"
                           Font-Strikeout="False" Font-Underline="False" ForeColor="Black" OnClientClick="return confirm('您确认删除该记录吗?');">删除</asp:LinkButton> 
                   </ItemTemplate>
               </asp:TemplateField>
           </Columns>
       </asp:GridView>
       <asp:Button ID="btnAddDepartment" runat="server" onclick="btnAddDepartment_Click"
           Text="添加部门" />
       当前页码为:<asp:Label ID="labPage" runat="server" Text="1"></asp:Label>  总页码为:<asp:Label
           ID="labBackPage" runat="server"></asp:Label>
           
       <asp:LinkButton ID="lnkbtnOne" runat="server" OnClick="lnkbtnOne_Click">第一页</asp:LinkButton>
       <asp:LinkButton ID="lnkbtnUp" runat="server" OnClick="lnkbtnUp_Click">上一页</asp:LinkButton>
        <asp:LinkButton ID="lnkbtnNext" runat="server" OnClick="lnkbtnNext_Click">下一页</asp:LinkButton>
       <asp:LinkButton ID="lnkbtnBack" runat="server" OnClick="lnkbtnBack_Click">最后一页</asp:LinkButton> 
    
   </div>

然后再看Departmant.aspx.cs的设计:

也一样要先加上:

using BLL;

using Model;

然后再:

public partial class departmant : PageBase
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            //验证权限
            IsAdmin();
            BinData();
 
        }
    }
    /// <summary>
    /// 绑定数据
    /// </summary>
    private void BinData()
    {
        departmentSystem DepartmentSystem = new departmentSystem();
        List<department> Departmentlist = new List<department>();
        //调用BLL方法获取列表
        Departmentlist = DepartmentSystem.GetDepartment();
        int curpage = Convert.ToInt32(this.labPage.Text);
        //设计分页
        PagedDataSource ps = new PagedDataSource();
        ps.DataSource = Departmentlist;
        ps.AllowPaging = true;
        //设置页面的条数
        ps.PageSize = 16;
        ps.CurrentPageIndex = curpage - 1;
        this.lnkbtnUp.Enabled = true;
        this.lnkbtnNext.Enabled = true;
        this.lnkbtnBack.Enabled = true;
        this.lnkbtnOne.Enabled = true;
        if (curpage == 1)
        {
            this.lnkbtnOne.Enabled = false;
            this.lnkbtnUp.Enabled = false;
 
        }
        if (curpage == ps.PageCount)
        {
            this.lnkbtnNext.Enabled = false;
            this.lnkbtnBack.Enabled = false;
 
        }
        this.labBackPage.Text = Convert.ToString(ps.PageCount);
        //绑定数据源
        GridView1.DataSource = ps;
        GridView1.DataBind();
    }
    /// <summary>
    /// 删除一条数据
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void GridView_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        int nid = Int32.Parse(GridView1.DataKeys[e.RowIndex].Value.ToString());
        departmentSystem DepartmentSystem = new departmentSystem();
        DepartmentSystem.Deletedepart(nid);
        BinData();
    }
    /// <summary>
    /// 第一页
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void lnkbtnOne_Click(object sender, EventArgs e)
    {
        this.labPage.Text = "1";
        BinData();
    }
    /// <summary>
    /// 上一页
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void lnkbtnUp_Click(object sender, EventArgs e)
    {
        this.labPage.Text = Convert.ToString(Convert.ToInt32(this.labPage.Text) - 1);
        BinData();
    }
    /// <summary>
    /// 下一页
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void lnkbtnNext_Click(object sender, EventArgs e)
    {
        this.labPage.Text = Convert.ToString(Convert.ToInt32(this.labPage.Text) + 1);
        BinData();
    }
    /// <summary>
    /// 最后一页
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void lnkbtnBack_Click(object sender, EventArgs e)
    {
        this.labPage.Text = this.labBackPage.Text;
        BinData();
 
    }
    /// <summary>
    /// 跳转到增加页面
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnAddDepartment_Click(object sender, EventArgs e)
    {
        Response.Redirect("ADDdepart.aspx");
    }
}