上接扩展GridView控件(3) - 根据按钮的CommandName设置其客户端属性

4、新建一个继承自ExpandableObjectConverter的类ConfirmButtonConverter

/// <summary>
         /// 类型转换器
         /// </summary>
         public class ConfirmButtonConverter : ExpandableObjectConverter
        {
                 /// <summary>
                 /// 返回值能否将ConfirmButton类型转换为String类型
                 /// </summary>
                 /// <param name="context"></param>
                 /// <param name="destinationType"></param>
                 /// <returns></returns>
                 public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
                {
                         if (destinationType == typeof( string))
                        {
                                 return true;
                        }
                         return base.CanConvertTo(context, destinationType);
                }

                 /// <summary>
                 /// 将ConfirmButton类型转换为String类型
                 /// </summary>
                 /// <param name="context"></param>
                 /// <param name="culture"></param>
                 /// <param name="value"></param>
                 /// <param name="destinationType"></param>
                 /// <returns></returns>
                 public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture,
                         object value, Type destinationType)
                {
                         if (value != null)
                        {
                                 if (!(value is YYControls.SmartGridView.ConfirmButton))
                                {
                                         throw new ArgumentException(
                                                 "无效的ConfirmButton", "value");
                                }
                        }

                         if (destinationType.Equals( typeof( string)))
                        {
                                 if (value == null)
                                {
                                         return String.Empty;
                                }
                                 return "ConfirmButton";
                        }
                         return base.ConvertTo(context, culture, value, destinationType);
                }
        }

 

5、在继承自GridView的类中加一个复杂对象属性，该复杂对象就是第3步创建的那个ConfirmButtons

private ConfirmButtons _confirmButtons;
                 /// <summary>
                 /// 确认按钮集合
                 /// </summary>
                [
                PersistenceMode(PersistenceMode.InnerProperty),
                DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
                Description( "确认按钮集合，确认按钮的CommandName和提示信息"),
                Category( "扩展")
                ]
                 public virtual ConfirmButtons ConfirmButtons
                {
                        get
                        {
                                 if (_confirmButtons == null)
                                {
                                        _confirmButtons = new ConfirmButtons();
                                }
                                 return _confirmButtons;
                        }
                }

 

6、重写OnRowDataBound实现单击命令按钮弹出确认框的功能。主要是给按钮增加一个客户端的onclick事件。

/// <summary>
                 /// OnRowDataBound
                 /// </summary>
                 /// <param name="e"></param>
                 protected override void OnRowDataBound(GridViewRowEventArgs e)
                {
                         if (e.Row.RowType == DataControlRowType.DataRow)
                        {
                                 if ( this._confirmButtons != null)
                                {
                                         // GridViewRow的每个TableCell
                                         foreach (TableCell tc in e.Row.Cells)
                                        {
                                                 // TableCell里的每个Control
                                                 foreach (Control c in tc.Controls)
                                                {
                                                         // 如果控件继承自接口IButtonControl
                                                         if (c.GetType().GetInterface( "IButtonControl") != null && c.GetType().GetInterface( "IButtonControl").Equals( typeof(IButtonControl)))
                                                        {
                                                                 // 从用户定义的ConfirmButtons集合中分解出ConfirmButton
                                                                 foreach (ConfirmButton cb in _confirmButtons)
                                                                {
                                                                         // 如果发现的按钮的CommandName在ConfirmButtons有定义的话
                                                                         if (((IButtonControl)c).CommandName == cb.CommandName)
                                                                        {
                                                                                 // 增加确认框属性
                                                                                ((IAttributeAccessor)c).SetAttribute( "onclick", "return confirm('" + cb.ConfirmMessage + "')");
                                                                                 break;
                                                                        }
                                                                }
                                                        }
                                                }
                                        }
                                }
                        }

                         base.OnRowDataBound(e);
                }

 

控件使用
添加这个控件到工具箱里，然后拖拽到webform上，设置其ConfirmButtons属性即可。CommandName是命令按钮的CommandName属性；ConfirmMessage是弹出的确认框所显示的文字。
ObjData.cs

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

<%@ 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>无标题页</title>
</head>
<body>
        <form id="form1" runat="server">
                <div>
                         
                        <yyc:SmartGridView ID="SmartGridView1" runat="server" AutoGenerateColumns="false"
                                DataSourceID="ObjectDataSource1">
                                <Columns>
                                        <asp:BoundField DataField="no" HeaderText="序号" SortExpression="no" />
                                        <asp:BoundField DataField="name" HeaderText="名称" SortExpression="name" />
                                        <asp:ButtonField CommandName="ConfirmTest" Text="确认按钮测试" />
                                </Columns>
                                <ConfirmButtons>
                                        <yyc:ConfirmButton ConfirmMessage="确认删除吗？" CommandName="ConfirmTest"></yyc:ConfirmButton>
                                </ConfirmButtons>
                        </yyc:SmartGridView>
                        <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="Select"
                                TypeName="OjbData"></asp:ObjectDataSource>
                </div>
        </form>
</body>
</html>

 

/*测试版的实现 结束*/

 

OK
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