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 }