datagridedit.aspx.cs

Microsoft?ASP.NET Programming with Microsoft Visual C#?.NET Version 2003 Step By Step

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace Chapter_09
{
	/// <summary>
	/// Summary description for DataGridEdit.
	/// </summary>
	public class DataGridEdit : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid MyGrid;
		protected System.Data.SqlClient.SqlDataAdapter PubAdapter;
		protected System.Data.SqlClient.SqlCommand sqlSelectCommand1;
		protected System.Data.SqlClient.SqlCommand sqlInsertCommand1;
		protected System.Data.SqlClient.SqlCommand sqlUpdateCommand1;
		protected System.Data.SqlClient.SqlCommand sqlDeleteCommand1;
		protected System.Data.SqlClient.SqlConnection PubsConn;
		protected Chapter_09.PublisherDataSet publisherDataSet1;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			PubAdapter.Fill(publisherDataSet1);
			if (!IsPostBack)
			{
				MyGrid.DataSource = publisherDataSet1.publishers.DefaultView;
				MyGrid.DataBind();
			}
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.PubAdapter = new System.Data.SqlClient.SqlDataAdapter();
			this.sqlDeleteCommand1 = new System.Data.SqlClient.SqlCommand();
			this.PubsConn = new System.Data.SqlClient.SqlConnection();
			this.sqlInsertCommand1 = new System.Data.SqlClient.SqlCommand();
			this.sqlSelectCommand1 = new System.Data.SqlClient.SqlCommand();
			this.sqlUpdateCommand1 = new System.Data.SqlClient.SqlCommand();
			this.publisherDataSet1 = new Chapter_09.PublisherDataSet();
			((System.ComponentModel.ISupportInitialize)(this.publisherDataSet1)).BeginInit();
			this.MyGrid.CancelCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.MyGrid_CancelCommand);
			this.MyGrid.EditCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.MyGrid_EditCommand);
			this.MyGrid.SortCommand += new System.Web.UI.WebControls.DataGridSortCommandEventHandler(this.MyGrid_SortCommand);
			this.MyGrid.UpdateCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.MyGrid_UpdateCommand);
			this.MyGrid.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.MyGrid_DeleteCommand);
			// 
			// PubAdapter
			// 
			this.PubAdapter.DeleteCommand = this.sqlDeleteCommand1;
			this.PubAdapter.InsertCommand = this.sqlInsertCommand1;
			this.PubAdapter.SelectCommand = this.sqlSelectCommand1;
			this.PubAdapter.TableMappings.AddRange(new System.Data.Common.DataTableMapping[] {
																								 new System.Data.Common.DataTableMapping("Table", "publishers", new System.Data.Common.DataColumnMapping[] {
																																																			   new System.Data.Common.DataColumnMapping("pub_id", "pub_id"),
																																																			   new System.Data.Common.DataColumnMapping("pub_name", "pub_name"),
																																																			   new System.Data.Common.DataColumnMapping("city", "city"),
																																																			   new System.Data.Common.DataColumnMapping("state", "state"),
																																																			   new System.Data.Common.DataColumnMapping("country", "country")})});
			this.PubAdapter.UpdateCommand = this.sqlUpdateCommand1;
			// 
			// sqlDeleteCommand1
			// 
			this.sqlDeleteCommand1.CommandText = @"DELETE FROM dbo.publishers WHERE (pub_id = @Original_pub_id) AND (city = @Original_city OR @Original_city IS NULL AND city IS NULL) AND (country = @Original_country OR @Original_country IS NULL AND country IS NULL) AND (pub_name = @Original_pub_name OR @Original_pub_name IS NULL AND pub_name IS NULL) AND (state = @Original_state OR @Original_state IS NULL AND state IS NULL)";
			this.sqlDeleteCommand1.Connection = this.PubsConn;
			this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_pub_id", System.Data.SqlDbType.NVarChar, 4, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "pub_id", System.Data.DataRowVersion.Original, null));
			this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_city", System.Data.SqlDbType.NVarChar, 20, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "city", System.Data.DataRowVersion.Original, null));
			this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_country", System.Data.SqlDbType.NVarChar, 30, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "country", System.Data.DataRowVersion.Original, null));
			this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_pub_name", System.Data.SqlDbType.NVarChar, 40, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "pub_name", System.Data.DataRowVersion.Original, null));
			this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_state", System.Data.SqlDbType.NVarChar, 2, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "state", System.Data.DataRowVersion.Original, null));
			// 
			// PubsConn
			// 
			this.PubsConn.ConnectionString = "workstation id=GEI_XP1;packet size=4096;integrated security=SSPI;data source=\"(lo" +
				"cal)\\VSdotNET\";persist security info=False;initial catalog=pubs";
			// 
			// sqlInsertCommand1
			// 
			this.sqlInsertCommand1.CommandText = "INSERT INTO dbo.publishers(pub_id, pub_name, city, state, country) VALUES (@pub_i" +
				"d, @pub_name, @city, @state, @country); SELECT pub_id, pub_name, city, state, co" +
				"untry FROM dbo.publishers WHERE (pub_id = @pub_id)";
			this.sqlInsertCommand1.Connection = this.PubsConn;
			this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@pub_id", System.Data.SqlDbType.NVarChar, 4, "pub_id"));
			this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@pub_name", System.Data.SqlDbType.NVarChar, 40, "pub_name"));
			this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@city", System.Data.SqlDbType.NVarChar, 20, "city"));
			this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@state", System.Data.SqlDbType.NVarChar, 2, "state"));
			this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@country", System.Data.SqlDbType.NVarChar, 30, "country"));
			// 
			// sqlSelectCommand1
			// 
			this.sqlSelectCommand1.CommandText = "SELECT pub_id, pub_name, city, state, country FROM dbo.publishers";
			this.sqlSelectCommand1.Connection = this.PubsConn;
			// 
			// sqlUpdateCommand1
			// 
			this.sqlUpdateCommand1.CommandText = @"UPDATE dbo.publishers SET pub_id = @pub_id, pub_name = @pub_name, city = @city, state = @state, country = @country WHERE (pub_id = @Original_pub_id) AND (city = @Original_city OR @Original_city IS NULL AND city IS NULL) AND (country = @Original_country OR @Original_country IS NULL AND country IS NULL) AND (pub_name = @Original_pub_name OR @Original_pub_name IS NULL AND pub_name IS NULL) AND (state = @Original_state OR @Original_state IS NULL AND state IS NULL); SELECT pub_id, pub_name, city, state, country FROM dbo.publishers WHERE (pub_id = @pub_id)";
			this.sqlUpdateCommand1.Connection = this.PubsConn;
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@pub_id", System.Data.SqlDbType.NVarChar, 4, "pub_id"));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@pub_name", System.Data.SqlDbType.NVarChar, 40, "pub_name"));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@city", System.Data.SqlDbType.NVarChar, 20, "city"));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@state", System.Data.SqlDbType.NVarChar, 2, "state"));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@country", System.Data.SqlDbType.NVarChar, 30, "country"));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_pub_id", System.Data.SqlDbType.NVarChar, 4, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "pub_id", System.Data.DataRowVersion.Original, null));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_city", System.Data.SqlDbType.NVarChar, 20, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "city", System.Data.DataRowVersion.Original, null));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_country", System.Data.SqlDbType.NVarChar, 30, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "country", System.Data.DataRowVersion.Original, null));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_pub_name", System.Data.SqlDbType.NVarChar, 40, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "pub_name", System.Data.DataRowVersion.Original, null));
			this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_state", System.Data.SqlDbType.NVarChar, 2, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "state", System.Data.DataRowVersion.Original, null));
			// 
			// publisherDataSet1
			// 
			this.publisherDataSet1.DataSetName = "PublisherDataSet";
			this.publisherDataSet1.Locale = new System.Globalization.CultureInfo("en-US");
			this.Load += new System.EventHandler(this.Page_Load);
			((System.ComponentModel.ISupportInitialize)(this.publisherDataSet1)).EndInit();

		}
		#endregion

		private void MyGrid_SortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
		{
			DataView SortView  = publisherDataSet1.publishers.DefaultView;
			SortView.Sort = e.SortExpression;
			MyGrid.DataSource = SortView;
			MyGrid.DataKeyField = "pub_id";
			MyGrid.DataBind();
		}

		private void MyGrid_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			MyGrid.DataSource = publisherDataSet1.publishers.DefaultView;
			MyGrid.DataKeyField = "pub_id";
			MyGrid.EditItemIndex = e.Item.ItemIndex;
			MyGrid.DataBind();
		}

		private void MyGrid_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			MyGrid.DataSource = publisherDataSet1.publishers.DefaultView;
			MyGrid.DataKeyField = "pub_id";
			MyGrid.EditItemIndex = -1;
			MyGrid.DataBind();
		}

		private void MyGrid_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			TextBox m_pub_name, m_city, m_state, m_country;
			m_pub_name = (TextBox)e.Item.Cells[3].Controls[0];
			m_city = (TextBox)e.Item.Cells[4].Controls[0];
			m_state = (TextBox)e.Item.Cells[5].Controls[0];
			m_country = (TextBox)e.Item.Cells[6].Controls[0];
			PublisherDataSet.publishersDataTable pubTable = publisherDataSet1.publishers;
			PublisherDataSet.publishersRow rowToUpdate = (PublisherDataSet.publishersRow)pubTable.Rows[e.Item.ItemIndex];
			rowToUpdate.pub_name = m_pub_name.Text;
			rowToUpdate.city = m_city.Text;
			rowToUpdate.state = m_state.Text;
			rowToUpdate.country = m_country.Text;
			PubAdapter.Update(publisherDataSet1);
			MyGrid.DataSource = publisherDataSet1.publishers.DefaultView;
			MyGrid.EditItemIndex = -1;
			MyGrid.DataBind();
		}

		private void MyGrid_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			publisherDataSet1.publishers.Rows[e.Item.ItemIndex].Delete();
			PubAdapter.Update(publisherDataSet1);
			MyGrid.DataSource = publisherDataSet1.publishers.DefaultView;
			MyGrid.EditItemIndex = -1;
			MyGrid.DataBind();
		}
	}
}