user.cs

visualc#+sql图书出租管理系统

			this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_UserPassword", System.Data.SqlDbType.NVarChar, 10, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "UserPassword", System.Data.DataRowVersion.Original, null));
			this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_UserSort", System.Data.SqlDbType.NVarChar, 10, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "UserSort", System.Data.DataRowVersion.Original, null));
			// 
			// sqlInsertCommand1
			// 
			this.sqlInsertCommand1.CommandText = "INSERT INTO [User] (UserID, UserPassword, UserSort) VALUES (@UserID, @UserPasswor" +
				"d, @UserSort); SELECT UserID, UserPassword, UserSort FROM [User] WHERE (UserID =" +
				" @UserID)";
			this.sqlInsertCommand1.Connection = this.sqlConnection1;
			this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@UserID", System.Data.SqlDbType.NVarChar, 10, "UserID"));
			this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@UserPassword", System.Data.SqlDbType.NVarChar, 10, "UserPassword"));
			this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@UserSort", System.Data.SqlDbType.NVarChar, 10, "UserSort"));
			// 
			// sqlSelectCommand1
			// 
			this.sqlSelectCommand1.CommandText = "SELECT UserID, UserPassword, UserSort FROM [User]";
			this.sqlSelectCommand1.Connection = this.sqlConnection1;
			// 
			// sqlUpdateCommand1
			// 
			this.sqlUpdateCommand1.CommandText = @"UPDATE [User] SET UserID = @UserID, UserPassword = @UserPassword, UserSort = @UserSort WHERE (UserID = @Original_UserID) AND (UserPassword = @Original_UserPassword OR @Original_UserPassword IS NULL AND UserPassword IS NULL) AND (UserSort = @Original_UserSort OR @Original_UserSort IS NULL AND UserSort IS NULL); SELECT UserID, UserPassword, UserSort FROM [User] WHERE (UserID = @UserID)";
			this.sqlUpdateCommand1.Connection = this.sqlConnection1;
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@UserID", System.Data.SqlDbType.NVarChar, 10, "UserID"));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@UserPassword", System.Data.SqlDbType.NVarChar, 10, "UserPassword"));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@UserSort", System.Data.SqlDbType.NVarChar, 10, "UserSort"));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_UserID", System.Data.SqlDbType.NVarChar, 10, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "UserID", System.Data.DataRowVersion.Original, null));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_UserPassword", System.Data.SqlDbType.NVarChar, 10, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "UserPassword", System.Data.DataRowVersion.Original, null));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_UserSort", System.Data.SqlDbType.NVarChar, 10, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "UserSort", System.Data.DataRowVersion.Original, null));
			// 
			// User
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.BackColor = System.Drawing.Color.LightGray;
			this.ClientSize = new System.Drawing.Size(448, 237);
			this.Controls.Add(this.lblDatasetPosition);
			this.Controls.Add(this.btnPrevious);
			this.Controls.Add(this.btnNext);
			this.Controls.Add(this.btnLast);
			this.Controls.Add(this.btnFirst);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.btnExit);
			this.Controls.Add(this.groupBox3);
			this.MaximizeBox = false;
			this.MinimizeBox = false;
			this.Name = "User";
			this.Text = "用户信息管理";
			this.Load += new System.EventHandler(this.User_Load);
			this.groupBox1.ResumeLayout(false);
			((System.ComponentModel.ISupportInitialize)(this.objDataSetUser)).EndInit();
			this.groupBox3.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		public void ErrorHandle(System.Exception E)
		{
			MessageBox.Show(E.ToString());
		}		

		private void ButtonPositonChange()
		{
			this.btnPrevious.Enabled=true;
			this.btnNext.Enabled=true;
			this.btnFirst.Enabled=true;
			this.btnLast.Enabled=true;
			if(this.BindingContext[this.objDataSetUser,"User"].Position==0)
			{
				this.btnFirst.Enabled=false;
				this.btnPrevious.Enabled=false;
			}
			if(this.BindingContext[this.objDataSetUser,"User"].Position==this.BindingContext[this.objDataSetUser,"User"].Count-1)
			{
				this.btnNext.Enabled=false;
				this.btnLast.Enabled=false;
			}
		}
		
		private void DatasetPostionChange()
		{
			this.lblDatasetPosition.Text=(this.BindingContext[this.objDataSetUser,"User"].Position+1)+"的"+
				(this.BindingContext[this.objDataSetUser,"User"].Count);
		}

		private void TextEnableControl(bool valid)
		{
			if(valid)
			{
				this.textId.Enabled=true;				
				this.textSort.Enabled=true;
				this.textPassword.Enabled=true;
				//this.chkValid.Enabled=true;
				
			}
			else
			{
				this.textId.Enabled=false;				
				this.textSort.Enabled=false;
				this.textPassword.Enabled=false;
				//this.chkValid.Enabled=false;
			}
		}

		private void ButtonEnableControl(bool valid)
		{
			if(valid)
			{
				this.btnCancel.Enabled=true;
				this.btnApply.Enabled=true;
			}
			else
			{
				this.btnCancel.Enabled=false;
				this.btnApply.Enabled=false;
			}
		}
						
		private void LoadDataSet()
		{
			DataSetUser objDataSetTemp=new DataSetUser();
			try
			{
				this.FillDataSet(objDataSetTemp);

			}
			catch (System.Exception E) 
			{
				// 在此处添加错误处理代码。
				this.ErrorHandle(E);
			}
			try
			{
				this.objDataSetUser.Clear();
				this.objDataSetUser.Merge(objDataSetTemp);
			}
			catch(System.Exception E) 
			{
				// 在此处添加错误处理代码。
				this.ErrorHandle(E);
			}
			
		}
		
		private void FillDataSet(DataSetUser dataset)
		{
			dataset.EnforceConstraints=false;
			try
			{
				this.sqlConnection1.Open();
				this.sqlDataAdapter1.Fill(dataset);
			}
			catch(System.Exception E)
			{
				this.ErrorHandle(E);
			}
		
			finally
			{
				dataset.EnforceConstraints=true;
				this.sqlConnection1.Close();
			}
		}

		private void User_Load(object sender, System.EventArgs e)
		{
			this.LoadDataSet();
			this.DatasetPostionChange();
			this.ButtonPositonChange();
			this.TextEnableControl(false);
			this.ButtonEnableControl(false);
		
		}
		
		private void btnNext_Click(object sender, System.EventArgs e)
		{
			this.BindingContext[this.objDataSetUser,"User"].Position+=1;
			this.ButtonPositonChange();
			this.DatasetPostionChange();

		}
		

		private void btnPrevious_Click(object sender, System.EventArgs e)
		{
			this.BindingContext[this.objDataSetUser,"User"].Position-=1;
			this.ButtonPositonChange();
			this.DatasetPostionChange();
		
		}

		private void btnFirst_Click(object sender, System.EventArgs e)
		{
			this.BindingContext[this.objDataSetUser,"User"].Position=0;
			this.ButtonPositonChange();
			this.DatasetPostionChange();
		}

		private void btnLast_Click(object sender, System.EventArgs e)
		{
			this.BindingContext[this.objDataSetUser,"User"].Position=this.BindingContext[this.objDataSetUser,"User"].Count-1;
			this.ButtonPositonChange();
			this.DatasetPostionChange();
		}		

		private void btnAdd_Click(object sender, System.EventArgs e)
		{
			try
			{
				this.BindingContext[this.objDataSetUser,"User"].AddNew();
			}
			catch(System.Exception E)
			{
				this.ErrorHandle(E);
			}
			this.DatasetPostionChange();
			this.ButtonPositonChange();	
			this.TextEnableControl(true);
			this.ButtonEnableControl(true);
		}

		private void btnDelete_Click(object sender, System.EventArgs e)
		{
			if((this.BindingContext[this.objDataSetUser,"User"].Count>0)&
				(MessageBox.Show("真的要删除此记录吗","确定删除",MessageBoxButtons.OKCancel,MessageBoxIcon.Question).Equals(DialogResult.OK)))
			{
				try
				{
					int currentPosition=this.BindingContext[this.objDataSetUser,"User"].Position;
					this.objDataSetUser.User.Rows[currentPosition].Delete();
				}
				catch(System.Exception E)
				{
					this.ErrorHandle(E);
				}
				this.ButtonPositonChange();
				this.DatasetPostionChange();
			}
			else
				return;
		}

		
		private void btnModify_Click(object sender, System.EventArgs e)
		{
			this.TextEnableControl(true);
			this.ButtonEnableControl(true);
		
		}

		private void btnQuery_Click(object sender, System.EventArgs e)
		{

		
		}
		
		public void UpdateDataSet()
		{
			this.BindingContext[this.objDataSetUser,"User"].EndCurrentEdit();
			DataSetUser objDataSetTemp=new DataSetUser();
			objDataSetTemp=(DataSetUser)(this.objDataSetUser.GetChanges());
			try
			{
				this.UpdateDataSource(objDataSetTemp);
				this.objDataSetUser.Merge(objDataSetTemp);
				this.objDataSetUser.AcceptChanges();
			}
			catch(System.Exception E)
			{
				this.ErrorHandle(E);
			}
		}
		

		public void UpdateDataSource(DataSetUser Changerows)
		{
			try
			{
				this.sqlConnection1.Open();
				this.sqlDataAdapter1.Update(Changerows);
			}
			catch(System.Exception E)
			{
				this.ErrorHandle(E);
			}
			finally
			{
				this.sqlConnection1.Close();

			}	
		}

		private void btnApply_Click(object sender, System.EventArgs e)
		{
			try
			{
				this.UpdateDataSet();
			}
			catch(System.Exception E)
			{
				this.ErrorHandle(E);
			}			
			this.ButtonPositonChange();
			this.DatasetPostionChange();
			this.TextEnableControl(false);
			this.ButtonEnableControl(false);
		}

		private void btnCancel_Click(object sender, System.EventArgs e)
		{
			try
			{
				this.BindingContext[this.objDataSetUser,"User"].CancelCurrentEdit();
			}
			catch(System.Exception E)
			{
				this.ErrorHandle(E);
			}			
			this.DatasetPostionChange();
			this.TextEnableControl(false);
			this.TextEnableControl(false);
			this.ButtonEnableControl(false);
			
		}

		private void btnExit_Click(object sender, System.EventArgs e)
		{
			this.Close();
		}		

	}
}