简单快速开发C\S架构程序用最简单的不分层最快的效率达到功能要求的例子程序FrmKnowledge日积月累功能的实现

用通用权限管理系统组件开发一个简易的日积月累功能的代码实现，运行效果如下效果，很多通用的小功能系统组件自动都实现了，那开发应用程序会变得又快又简单了。

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 具体代码参考如下：

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 1 // --------------------------------------------------------------------
  2 // All Rights Reserved , Copyright (C) 2012 , Hairihan TECH, Ltd.
 3 // --------------------------------------------------------------------
 4
 5 using System;
 6 using System.Data;
 7 using System.Windows.Forms;
 8
 9 namespace DotNet.WinForm
10 {
11 using DotNet.Business;
12 using DotNet.Utilities;
13
14 /// <summary>
15 /// FrmKnowledge.cs
 16 /// 日积月累
 17 ///
18 /// 修改记录
 19 ///
20 ///     2012.09.03 版本：1.0 JiRiGaLa  修改功能页面编写。
 21 ///
22 /// 版本：1.0
 23 ///
24 /// <author>
25 /// <name> JiRiGaLa </name>
26 /// <date> 2012.09.03 </date>
27 /// </author>
28 /// </summary>
29 public partial class FrmKnowledge : BaseForm
30     {
31 public FrmKnowledge()
32         {
33             InitializeComponent();
34         }
35
36 /// <summary>
37 /// 日积月累的知识库
 38 /// </summary>
39        DataTable dtKnowledge = null;
40
41 /// <summary>
42 /// 当前显示第几条
 43 /// </summary>
44 int CurrentIndex = 0;
45
46 #region public override void ShowEntity() 显示内容
47 /// <summary>
48 /// 显示内容
 49 /// </summary>
50 public override void ShowEntity()
51         {
52 // 显示信息
53            BaseCommentEntity commentEntity = new BaseCommentEntity(dtKnowledge.Rows[ this.CurrentIndex]);
54 this.txtContents.Text = commentEntity.Contents;
55         }
56 #endregion
57
58 public override void SetControlState()
59         {
60 if ( this.dtKnowledge != null && this.dtKnowledge.Rows.Count > 0)
61             {
62 this.btnNext.Enabled = true;
63 if ( this.CurrentIndex == this.dtKnowledge.Rows.Count - 1)
64                 {
65 this.btnNext.Enabled = false;
66                 }
67 this.btnPrevious.Enabled = true;
68 if ( this.CurrentIndex == 0)
69                 {
70 this.btnPrevious.Enabled = false;
71                 }
72             }
73         }
74
75 #region public override void FormOnLoad() 加载窗体
76 /// <summary>
77 /// 加载窗体
 78 /// </summary>
79 public override void FormOnLoad()
80         {
81 // 获取数据
82            SQLBuilder sqlBuilder = new SQLBuilder( this.UserCenterDbHelper);
83             sqlBuilder.BeginSelect( " BaseKnowledge ");
84 // 只获取前200个数据就可以了，减小网络传递数据的网络带宽。
85            sqlBuilder.SelectTop( 200);
86 if (! string.IsNullOrEmpty( this.EntityId))
87             {
88                 sqlBuilder.SetWhere(BaseCommentEntity.FieldId, this.EntityId);
89             }
90 // 这里是为了每次显示的数据都是乱序的，数据测循序是被打乱的。
91            sqlBuilder.SetOrderBy( " NEWID() ");
92             dtKnowledge = sqlBuilder.EndSelect();
93 if (dtKnowledge.Rows.Count > 1)
94             {
95 this.CurrentIndex = new Random().Next( 0, dtKnowledge.Rows.Count - 1);
96             }
97 // 显示实体
98 this.ShowEntity();
99
100 // 显示日积月累
101 string showKnowledge = DotNetService.Instance.ParameterService.GetParameter(BaseSystemInfo.UserInfo, " User ", " ShowKnowledg ", " Show ");
102 if (! string.IsNullOrEmpty(showKnowledge))
103             {
104 this.chkShowKnowledge.Checked = showKnowledge.Equals( true.ToString());
105             }
106         }
107 #endregion
108
109 private void chkShowKnowledge_CheckedChanged( object sender, EventArgs e)
110         {
111 if ( this.FormLoaded)
112             {
113                 DotNetService.Instance.ParameterService.SetParameter(BaseSystemInfo.UserInfo, " User ", " ShowKnowledg ", " Show ", this.chkShowKnowledge.Checked.ToString());
114             }
115         }
116
117 private void btnPrevious_Click( object sender, EventArgs e)
118         {
119 if ( this.CurrentIndex > 0)
120             {
121 this.CurrentIndex--;
122 this.ShowEntity();
123             }
124 this.SetControlState();
125         }
126
127 private void btnNext_Click( object sender, EventArgs e)
128         {
129 if ( this.CurrentIndex < this.dtKnowledge.Rows.Count - 1)
130             {
131 this.CurrentIndex++;
132 this.ShowEntity();
133             }
134 this.SetControlState();
135         }
136
137 private void btnColse_Click( object sender, EventArgs e)
138         {
139 this.Close();
140         }
141     }
142 }
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