GridView控件

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控件开发
1、新建一个继承自GridView的类。

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/// <summary>/// 继承自GridView/// </summary>[ToolboxData(@"<{0}:SmartGridView runat='server'></{0}:SmartGridView>")]public class SmartGridView : GridView{}

2、新建一个Paging类，定义一个分页样式的枚举

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using System;using System.Collections.Generic;using System.Text;using System.ComponentModel;namespace YYControls.SmartGridView{    /// <summary>    /// 自定义分页相关    /// </summary>    public class Paging    {        /// <summary>        /// 自定义分页样式        /// </summary>        public enum PagingStyleCollection        {            /// <summary>            /// 不用自定义分页样式            /// </summary>            None,            /// <summary>            /// 默认自定义分页样式            /// </summary>            Default        }    }}

3、在继承自GridView的类中加一个上面定义的枚举属性

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private Paging.PagingStyleCollection _pagingStyle;/// <summary>/// 自定义分页样式/// </summary>[Description("自定义分页样式"), DefaultValue(""), Category("扩展")]public Paging.PagingStyleCollection PagingStyle{    get { return _pagingStyle; }    set { _pagingStyle = value; }}

4、如果GridView使用的是数据源控件的话，计算总记录数

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/// <summary>/// OnLoad/// </summary>/// <param name="e"></param>protected override void OnLoad(EventArgs e){    // 查找ObjectDataSource    ObjectDataSource ods = Parent.FindControl(this.DataSourceID) as ObjectDataSource;    if (ods != null)    {        ods.Selected += new ObjectDataSourceStatusEventHandler(ods_Selected);    }    base.OnLoad(e);}private int? _recordCount = null;/// <summary>/// 计算总记录数/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void ods_Selected(object sender, ObjectDataSourceStatusEventArgs e){    if (e.ReturnValue is IListSource)    {        _recordCount = ((IListSource) e.ReturnValue).GetList().Count;    }}

5、重写OnRowCreated以实现自定义分页样式

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/// <summary>/// OnRowCreated/// </summary>/// <param name="e"></param>protected override void OnRowCreated(GridViewRowEventArgs e){    if (e.Row.RowType == DataControlRowType.Pager         && PagingStyle == Paging.PagingStyleCollection.Default)    {        LinkButton First = new LinkButton();        LinkButton Prev = new LinkButton();        LinkButton Next = new LinkButton();        LinkButton Last = new LinkButton();        TableCell tc = new TableCell();        e.Row.Controls.Clear();        tc.Controls.Add(new LiteralControl("&nbsp;&nbsp;"));        if (_recordCount.HasValue)        {            tc.Controls.Add(new LiteralControl(_recordCount.ToString()));            tc.Controls.Add(new LiteralControl("&nbsp;&nbsp;"));            tc.Controls.Add(new LiteralControl(PageSize.ToString()));            tc.Controls.Add(new LiteralControl("&nbsp;&nbsp;"));        }        tc.Controls.Add(new LiteralControl((PageIndex + 1).ToString()));        tc.Controls.Add(new LiteralControl("/"));        tc.Controls.Add(new LiteralControl(PageCount.ToString()));        tc.Controls.Add(new LiteralControl("&nbsp;&nbsp;&nbsp;&nbsp;"));        if (!String.IsNullOrEmpty(PagerSettings.FirstPageImageUrl))        {            First.Text = "<img src='" + ResolveUrl(PagerSettings.FirstPageImageUrl)                 + "' border='0'/>";        }        else        {            First.Text = PagerSettings.FirstPageText;        }        First.CommandName = "Page";        First.CommandArgument = "First";        First.Font.Underline = false;        if (!String.IsNullOrEmpty(PagerSettings.PreviousPageImageUrl))        {            Prev.Text = "<img src='" + ResolveUrl(PagerSettings.PreviousPageImageUrl)                 + "' border='0'/>";        }        else        {            Prev.Text = PagerSettings.PreviousPageText;        }        Prev.CommandName = "Page";        Prev.CommandArgument = "Prev";        Prev.Font.Underline = false;        if (!String.IsNullOrEmpty(PagerSettings.NextPageImageUrl))        {            Next.Text = "<img src='" + ResolveUrl(PagerSettings.NextPageImageUrl)                 + "' border='0'/>";        }        else        {            Next.Text = PagerSettings.NextPageText;        }        Next.CommandName = "Page";        Next.CommandArgument = "Next";        Next.Font.Underline = false;        if (!String.IsNullOrEmpty(PagerSettings.LastPageImageUrl))        {            Last.Text = "<img src='" + ResolveUrl(PagerSettings.LastPageImageUrl)                 + "' border='0'/>";        }        else        {            Last.Text = PagerSettings.LastPageText;        }        Last.CommandName = "Page";        Last.CommandArgument = "Last";        Last.Font.Underline = false;        if (this.PageIndex <= 0)        {            First.Enabled = Prev.Enabled = false;        }        else        {            First.Enabled = Prev.Enabled = true;        }        tc.Controls.Add(First);        tc.Controls.Add(new LiteralControl("&nbsp;&nbsp;"));        tc.Controls.Add(Prev);        tc.Controls.Add(new LiteralControl("&nbsp;&nbsp;"));        // 当前页左边显示的数字分页按钮的数量        int rightCount = (int) (PagerSettings.PageButtonCount / 2);        // 当前页右边显示的数字分页按钮的数量        int leftCount = PagerSettings.PageButtonCount % 2 == 0 ? rightCount - 1 : rightCount;        for (int i = 0; i < PageCount; i++)        {            if (PageCount > PagerSettings.PageButtonCount)            {                if (i < PageIndex - leftCount                     && PageCount - 1 - i > PagerSettings.PageButtonCount - 1)                {                    continue;                }                else if (i > PageIndex + rightCount                     && i > PagerSettings.PageButtonCount - 1)                {                    continue;                }            }            if (i == PageIndex)            {                tc.Controls.Add(new LiteralControl("<span style='color:red;font-weight:bold'>" + (i + 1).ToString() + "</span>"));            }            else            {                LinkButton lb = new LinkButton();                lb.Text = (i + 1).ToString();                lb.CommandName = "Page";                lb.CommandArgument = (i + 1).ToString();                tc.Controls.Add(lb);            }            tc.Controls.Add(new LiteralControl("&nbsp;&nbsp;"));        }        if (this.PageIndex >= PageCount - 1)        {            Next.Enabled = Last.Enabled = false;        }        else        {            Next.Enabled = Last.Enabled = true;        }        tc.Controls.Add(Next);        tc.Controls.Add(new LiteralControl("&nbsp;&nbsp;"));        tc.Controls.Add(Last);        tc.Controls.Add(new LiteralControl("&nbsp;&nbsp;"));        tc.ColumnSpan = this.Columns.Count;        e.Row.Controls.Add(tc);    }    base.OnRowCreated(e);}

控件使用
添加这个控件到工具箱里，然后拖拽到webform上，设置PagingStyle属性为Default，同时设置GridView的原有属性PageButtonCount，FirstPageText，PreviousPageText，NextPageText，LastPageText，FirstPageImageUrl，PreviousPageImageUrl，NextPageImageUrl，LastPageImageUrl
ObjData.cs

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using System;using System.Data;using System.Configuration;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.ComponentModel;/// <summary>/// OjbData 的摘要说明/// </summary>public class OjbData{    public OjbData()    {        //        // TODO: 在此处添加构造函数逻辑        //    }    [DataObjectMethod(DataObjectMethodType.Select, true)]    public DataTable Select()    {        DataTable dt = new DataTable();        dt.Columns.Add("no", typeof(string));        dt.Columns.Add("name", typeof(string));        for (int i = 0; i < 30; i++)        {            DataRow dr = dt.NewRow();            dr[0] = "no" + i.ToString().PadLeft(2, '0');            dr[1] = "name" + i.ToString().PadLeft(2, '0');            dt.Rows.Add(dr);        }        return dt;    }}

Default.aspx

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server">    <title>SmartGridView测试</title></head><body>    <form id="form1" runat="server">        <div>            <yyc:SmartGridView ID="SmartGridView1" runat="server" DataSourceID="ObjectDataSource1"                AutoGenerateColumns="False" AllowPaging="true" PagingStyle="Default">                <Columns>                    <asp:BoundField DataField="no" HeaderText="序号" SortExpression="no" ItemStyle-Width="100px" />                    <asp:BoundField DataField="name" HeaderText="名称" SortExpression="name" ItemStyle-Width="100px" />                    <asp:BoundField DataField="no" HeaderText="序号" SortExpression="no" ItemStyle-Width="100px" />                    <asp:BoundField DataField="name" HeaderText="名称" SortExpression="name" ItemStyle-Width="100px" />                    <asp:BoundField DataField="no" HeaderText="序号" SortExpression="no" ItemStyle-Width="100px" />                    <asp:BoundField DataField="name" HeaderText="名称" SortExpression="name" ItemStyle-Width="100px" />                </Columns>            </yyc:SmartGridView>            <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="Select"                TypeName="OjbData"></asp:ObjectDataSource>        </div>    </form></body></html>