formmsgmis.cs

该即时通讯系统系统能够实现像QQ一样的通讯功能

			}

			this.statusBar1.Panels[1].Text="第"+this.CurrPage.ToString()+"页(共"+ this.PageCount.ToString() +"页)";
		}

		public void selectID(string ID)
		{
			if(ID=="")return;
			if(ID=="Notice")this.TV_user.SelectedNode=this.TV_user.Nodes[1];
			else
			{
              for(int i=0;i<this.TV_user.Nodes[0].Nodes.Count ;i++)
                foreach(System.Windows.Forms.TreeNode node in TV_user.Nodes[0].Nodes[i].Nodes)
					if(node.Tag.ToString()==ID)
					{
						node.Parent.Expand();
						this.TV_user.SelectedNode=node;
			            return;
					}
			}
		}

		public int CurrPage=0;//当前浏览的页
		public int PageCount=0;//页的总数
		public int pageSize=20;//每一页显示的记录数
		public int firstID=0;
		public int LastID=2147483647;
        public string CurrUser="";
        

		private int GetPageCount(string userID,string MyID,bool IsNotNotice)//获得页数
		{
			string DBtable="Notice";
			string sql="select Null from ["+DBtable+"] where (sendID='"+ MyID +"' or ReceiveID='"+ MyID +"')";

			if(IsNotNotice)
			{
				DBtable="MsgRecord";
				sql="select Null from ["+DBtable+"] where (sendID='"+ userID +"' and ReceiveID='"+ MyID +"') or (sendID='"+ MyID +"' and ReceiveID='"+ userID +"')";

			}
			int rows=new ClassOptionData(new ClassFormMain().ConStr).ExSQLR(sql);
			int count=Convert.ToInt32(rows/this.pageSize);
			if((rows % this.pageSize)!=0)
               count += 1;
			return count;
		}
 
		private void DBRecordToRichTextBox(string userID,string MyID,bool IsNotNotice,bool IsDown,bool IsFirst,bool IsLast)
		{

			this.RTBRecord.Clear();

			string DBtable="Notice";
			string Qualification=" (sendID='"+ MyID +"' or ReceiveID='"+ MyID +"')";
			string sql="";
            
            

			if(IsNotNotice)
			{
				DBtable="MsgRecord";
				Qualification=" ((sendID='"+ userID +"' and ReceiveID='"+ MyID +"') or (sendID='"+ MyID +"' and ReceiveID='"+ userID +"'))";
			}

           
			if(IsDown)
			{
				this.CurrPage++;
                sql="select top "+ this.pageSize.ToString() +" * from ["+DBtable+"] where "+Qualification+" and ID<"+ this.LastID.ToString() +"  ORDER BY ID DESC";
			}
			else
			{
				this.CurrPage--;
				sql="select * from ["+DBtable+"] where ID in(select top "+ this.pageSize.ToString() +" ID from ["+DBtable+"] where "+Qualification+" and ID>"+ this.firstID.ToString() +")  ORDER BY ID DESC";//+"  ORDER BY ID DESC";
			}

			if(IsFirst) 
			{
			    this.CurrPage=1;
				sql="select top "+ this.pageSize.ToString() +" * from ["+DBtable+"] where "+Qualification+" ORDER BY ID DESC";
			}
			if(IsLast)
			{
			    this.CurrPage=this.PageCount;
				int mod=this.PageCount % this.pageSize;
				if( mod!=0)
				  sql="select * from ["+DBtable+"] where ID in(select top "+ mod +" ID from ["+DBtable+"] where "+Qualification+") ORDER BY ID DESC";
				else
                  sql="select * from ["+DBtable+"] where ID in(select top "+ this.pageSize.ToString() +" ID from ["+DBtable+"] where "+Qualification+"  ORDER BY ID DESC";
			}

			this.ButLast.Enabled=true;
			this.ButDown.Enabled=true;
			this.ButFirst.Enabled=true;
			this.ButUp.Enabled=true;
			this.ButDelRecord.Enabled=true;

			this.menuItemEditFirst.Enabled=true;
			this.menuItemEditFUp.Enabled=true;
			this.menuItemEditDown.Enabled=true;
			this.menuItemEditLast.Enabled=true;
            this.menuItemEditDelRecord.Enabled=true;

			if(this.CurrPage==this.PageCount)
			{
			   this.ButLast.Enabled=false;
			   this.ButDown.Enabled=false;
				this.menuItemEditDown.Enabled=false;
				this.menuItemEditLast.Enabled=false;

			}
			if(this.CurrPage==1)
			{
			    this.ButFirst.Enabled=false;
				this.ButUp.Enabled=false;
				this.menuItemEditFirst.Enabled=false;
				this.menuItemEditFUp.Enabled=false;
			}
            

			System.Data.OleDb.OleDbDataReader dr=new ClassOptionData(new ClassFormMain().ConStr ).ExSQLReDr(sql);
			
			LanMsg.ClassUserInfo sendUserInfo=this.FormMain.formMain.selfInfo ;
        
			int i=0;
            bool IsSend=false;//标识此消息是否是对方发送的

			if(dr!=null)
			{
				while(dr.Read())
				{
					if(i==0)
						this.firstID=Convert.ToInt32(dr["ID"]);
					i++;

					IsSend=false;//标识此消息否是对方发送的

					sendUserInfo=null;
					LanMsg.MyExtRichTextBox rich=new MyExtRichTextBox();
					rich.ForeColor=Color.Blue;

					sendUserInfo=this.FormMain.formMain.findUser(Convert.ToString(dr["sendID"]).Trim());

					if(sendUserInfo!=null && sendUserInfo.ID==userID)
					{
						rich.ForeColor=Color.Red;
						IsSend=true;//此消息为对方发送的
					}

					rich.AppendText(sendUserInfo.UserName  + "("+sendUserInfo.ID +")" + Convert.ToString(dr["msgDateTime"]));
					this.RTBRecord.AppendRtf(rich.Rtf);
					rich.Clear();
					rich.Dispose();

					this.RTBRecord.AppendTextAsRtf("    ");

					if(IsNotNotice)
						textMsgToRich(Convert.ToString(dr["msgContent"]),Convert.ToString(dr["imageInfo"]),IsSend);
					else
						this.RTBRecord.AppendText(Convert.ToString(dr["msgContent"])+"\n");


					LastID=Convert.ToInt32(dr["ID"]);
				}
				dr.Close();
			}
			this.statusBar1.Panels[1].Text="第"+this.CurrPage.ToString()+"页(共"+ this.PageCount.ToString() +"页)";

		}

		private void textMsgToRich(string msgContent,string ImageInfo,bool IsSend)//添加文本消息与图片到richBox
		{
            LanMsg.ClassTextMsg textMsg=new ClassTextMsg();
			textMsg.MsgContent=msgContent;
			textMsg.ImageInfo=ImageInfo;

			if(textMsg.ImageInfo!="")//如果消息中有图片，则添加图片
			{
				string[] imagePos=textMsg.ImageInfo.Split('|');
				int addPos=0;//
				int currPos=0;//当前正要添加的文本位置
				int textPos=0;
				for(int i=0;i<imagePos.Length-1;i++)
				{
					string[] imageContent=imagePos[i].Split(',');//获得图片所在的位置、图片名称、图片宽、高

					currPos=Convert.ToInt32(imageContent[0]);
		
					this.RTBRecord.AppendText(textMsg.MsgContent.Substring(textPos,currPos-addPos));
					this.RTBRecord.SelectionStart=this.RTBRecord.TextLength;

					textPos += currPos-addPos ;
					addPos += currPos-addPos;
					System.Drawing.Image image=System.Drawing.Image.FromStream(System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("LanMsg.Resources.ErrorImage.GIF")) ; 
						
//					LanMsg.MyPicture pic=new MyPicture();
//					pic.BackColor=this.RTBRecord.BackColor;
//					pic.SizeMode=System.Windows.Forms.PictureBoxSizeMode.AutoSize; 
					if(Convert.ToUInt32(imageContent[1])<96)
//						pic.Image=System.Drawing.Image.FromStream(System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("LanMsg.Resources."+ imageContent[1] +".gif")) ; 
				      image=System.Drawing.Image.FromStream(System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("LanMsg.Resources."+ imageContent[1] +".gif")) ; 
					else
					{
					    if(IsSend && new System.IO.FileInfo(Application.StartupPath +"\\ArrivalImage\\"+ imageContent[1] +".gif").Exists)
					        image=System.Drawing.Image.FromFile(Application.StartupPath +"\\ArrivalImage\\"+ imageContent[1] +".gif");
						else if(!IsSend && new System.IO.FileInfo(Application.StartupPath +"\\sendImage\\"+ imageContent[1] +".gif").Exists)
					        image=System.Drawing.Image.FromFile(Application.StartupPath +"\\sendImage\\"+ imageContent[1] +".gif");

//						pic.Tag=imageContent[1];
//						pic.Image=System.Drawing.Image.FromStream(System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("LanMsg.Resources.ErrorImage.GIF")) ;
					}

                    this.RTBRecord.InsertImage(image);
//					this.RTBRecord.InsertMyControl(pic);

					addPos ++;
				}
				this.RTBRecord.AppendText(textMsg.MsgContent.Substring(textPos,textMsg.MsgContent.Length-textPos) +"\n");
			}
			else//如果消息中没有图片，则直接添加消息文本
			{
				this.RTBRecord.AppendText(textMsg.MsgContent +"\n");
			}
		}


		private void delRecord(bool IsNotNotice)
		{
			if(MessageBox.Show("确定要删除当前的所有对话记录吗?","提示",System.Windows.Forms.MessageBoxButtons.YesNoCancel,System.Windows.Forms.MessageBoxIcon.Question)!=System.Windows.Forms.DialogResult.Yes)return;
			string DBtable="Notice";
			if(IsNotNotice)
			{
				DBtable="MsgRecord";
			}
            string sql="delete * from ["+DBtable+"] where (sendID='"+ this.CurrUser  +"' or ReceiveID='"+ this.CurrUser +"')";
		    new ClassOptionData(new ClassFormMain().ConStr).ExSQL(sql);
			this.RTBRecord.Clear();
			this.ButDelRecord.Enabled=false;
		}

		private void toolBar1_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
		{
			bool t=true;
            if(this.TV_user.Nodes[1].IsSelected )t=false;

			switch(e.Button.ToolTipText)
			{
				case "第一页":
					DBRecordToRichTextBox(this.CurrUser,this.FormMain.formMain.selfInfo.ID,t,false,true,false);
					break;
				case "上一页":
					DBRecordToRichTextBox(this.CurrUser,this.FormMain.formMain.selfInfo.ID,t,false,false,false);
					break;
				case "下一页":
					DBRecordToRichTextBox(this.CurrUser,this.FormMain.formMain.selfInfo.ID,t,true,false,false);
					break;
				case "最后一页":
					DBRecordToRichTextBox(this.CurrUser,this.FormMain.formMain.selfInfo.ID,t,false,false,true);
					break;
				case "关闭":
					this.Dispose();
					break;
				case "删除记录":
					delRecord(t);			
					break;
			}
		}

		private void menuItemCopy_Click(object sender, System.EventArgs e)
		{
			this.RTBRecord.Copy();
		}

		private void menuItemSelectAll_Click(object sender, System.EventArgs e)
		{
			this.RTBRecord.SelectAll();
		}

		private void menuItemEditCopy_Click(object sender, System.EventArgs e)
		{
		  this.RTBRecord.Copy();
		}

		private void menuItemEditSelectAll_Click(object sender, System.EventArgs e)
		{
		   this.RTBRecord.Focus();
		  this.RTBRecord.SelectAll();
		}

		private void menuItemEditFirst_Click(object sender, System.EventArgs e)
		{
			bool t=true;
			if(this.TV_user.Nodes[1].IsSelected )t=false;

			DBRecordToRichTextBox(this.CurrUser,this.FormMain.formMain.selfInfo.ID,t,false,true,false);
		}

		private void menuItemEditFUp_Click(object sender, System.EventArgs e)
		{
			bool t=true;
			if(this.TV_user.Nodes[1].IsSelected )t=false;

			DBRecordToRichTextBox(this.CurrUser,this.FormMain.formMain.selfInfo.ID,t,false,false,false);
		}

		private void menuItemEditDown_Click(object sender, System.EventArgs e)
		{
			bool t=true;
			if(this.TV_user.Nodes[1].IsSelected )t=false;

			DBRecordToRichTextBox(this.CurrUser,this.FormMain.formMain.selfInfo.ID,t,true,false,false);
		
		}

		private void menuItemEditLast_Click(object sender, System.EventArgs e)
		{
			bool t=true;
			if(this.TV_user.Nodes[1].IsSelected )t=false;

			DBRecordToRichTextBox(this.CurrUser,this.FormMain.formMain.selfInfo.ID,t,false,false,true);
		
		}

		private void menuItemEditDelRecord_Click(object sender, System.EventArgs e)
		{
			bool t=true;
			if(this.TV_user.Nodes[1].IsSelected )t=false;
			delRecord(t);			
		}
	}
}