defaultcs.aspx.cs

Telerik是很大的第三方软件制造商

using System;
using System.Drawing;
using Telerik.QuickStart;
using Telerik.WebControls;
using Telerik.WebControls.CallbackControls;

namespace Telerik.CallbackExamplesCSharp.Controls.Button
{
	/// <summary>
	/// Summary description for _Default.
	/// </summary>
	public class DefaultCS: XhtmlPage
	{
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.Label Label3;
		protected CallbackButton btnAdd;
		protected CallbackButton btnRemove;
		protected CallbackButton btnUpdate;
		protected CallbackTextBox tbName;
		protected CallbackTextBox tbFamilyName;
		protected System.Web.UI.WebControls.Label label11;
		protected System.Web.UI.WebControls.Label statusLabel;
		protected Telerik.WebControls.LoadingPanel LoadingPanel1;
		protected System.Web.UI.HtmlControls.HtmlImage Img1;
		protected Telerik.WebControls.LoadingPanel LoadingPanel2;
		protected System.Web.UI.HtmlControls.HtmlImage Img2;
		protected CallbackListBox lbNames;

		private void Page_Load(object sender, EventArgs e)
		{							
		}

		#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.tbName.KeyUp += new Telerik.WebControls.CallbackControls.KeyPressEventHandler(this.tbName_KeyUp);
			this.tbFamilyName.KeyUp += new Telerik.WebControls.CallbackControls.KeyPressEventHandler(this.tbFamilyName_KeyUp);
			this.btnAdd.Click += new System.EventHandler(this.CallbackButton1_Click);
			this.btnAdd.KeyPress += new Telerik.WebControls.CallbackControls.KeyPressEventHandler(this.btnAdd_KeyPress);
			this.btnRemove.Click += new System.EventHandler(this.btnRemove_Click);
			this.btnRemove.KeyPress += new Telerik.WebControls.CallbackControls.KeyPressEventHandler(this.btnRemove_KeyPress);
			this.btnUpdate.Click += new System.EventHandler(this.btnUpdate_Click);
			this.btnUpdate.KeyPress += new Telerik.WebControls.CallbackControls.KeyPressEventHandler(this.btnUpdate_KeyPress);
			this.lbNames.SelectedIndexChanged += new System.EventHandler(this.lbNames_SelectedIndexChanged);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void ResetControls()
		{
			tbName.BackColor = Color.White;
			tbFamilyName.BackColor = Color.White;
			Label3.Text = "All fields are required!";
		}
		

		private void CallbackButton1_Click(object sender, EventArgs e)
		{
			if ((tbName.Text.Length > 0) && (tbFamilyName.Text.Length > 0))
			{
				lbNames.Items.Add(tbName.Text + " " + tbFamilyName.Text);
				tbName.Text				= "";
				tbFamilyName.Text		= "";
				btnAdd.ResponseScript	= "document.getElementById('" + tbFamilyName.ClientID + "').value = '';";
				DisableButtons();
				ResetControls();
			}
			else
			{
				HandleError();				
			}
		}

		private void HandleError()
		{
			if (tbName.Text.Length == 0)
			{
				tbName.BackColor = Color.Pink;
			}
			if (tbFamilyName.Text.Length == 0)
			{
				tbFamilyName.BackColor = Color.Pink;				
			}

			if ( (tbName.Text.Length == 0) && (tbFamilyName.Text.Length == 0) )
			{
				Label3.Text = "Name or Family Name is missing.";
			}
			else if (tbName.Text.Length == 0)
			{
				Label3.Text = "Name is missing!";
			}
			else if (tbFamilyName.Text.Length == 0)
			{
				Label3.Text = "Family Name is missing!";
			}
			else 
			{
			}
		}

		private void DisableButtons()
		{
			btnAdd.Enabled = false;
			btnRemove.Enabled = false;
			btnUpdate.Enabled = false;
		}

		private void btnRemove_Click(object sender, EventArgs e)
		{
			lbNames.Items.RemoveAt(lbNames.SelectedIndex);
			btnRemove.Enabled = false;
			btnUpdate.Enabled = false;
			tbName.Text = "";
			tbFamilyName.Text = "";			
		}

		private void btnUpdate_Click(object sender, EventArgs e)
		{
			if ((tbName.Text != string.Empty) && (tbFamilyName.Text != string.Empty))
			{
				lbNames.SelectedItem.Text = tbName.Text + " " + tbFamilyName.Text;
				btnRemove.Enabled = false;
				btnUpdate.Enabled = false;
				btnAdd.Enabled = false;
				tbName.Text = string.Empty;
				tbFamilyName.Text = string.Empty;
				Update = false;
			}
			else
			{
				HandleError();
			}
		}

		private void UpdateButtonState()
		{
			if ((tbName.Text == string.Empty) && (tbFamilyName.Text == string.Empty))
			{
				btnAdd.Enabled		= false;
				btnUpdate.Enabled	= false;
			}
			else
			{
				btnAdd.Enabled = true;
				if (Update)
				{
					if (lbNames.SelectedIndex > -1)
					{
						btnUpdate.Enabled = true;
					}
				}
			}			

			if (tbName.Text.Length > 0)
			{
				tbName.ResponseScript = string.Format("document.getElementById('{0}').style.backgroundColor='white';", tbName.ClientID);
				tbName.BackColor = Color.White;
			}
			if (tbFamilyName.Text.Length > 0)
			{
				tbFamilyName.ResponseScript = string.Format("document.getElementById('{0}').style.backgroundColor='white';", tbFamilyName.ClientID);
				tbFamilyName.BackColor = Color.White;
			}
		}

		private void tbName_KeyUp(object sender, KeyEventArgs args)
		{
			UpdateButtonState();
		}

		private void tbFamilyName_KeyUp(object sender, KeyEventArgs args)
		{			
			UpdateButtonState();			
		}

		private void lbNames_SelectedIndexChanged(object sender, EventArgs e)
		{	
			string txt = lbNames.SelectedItem.Text;
			string[] names = txt.Split(' ');
			tbName.Text = names[0];
			tbFamilyName.Text = names[1];	
			btnRemove.Enabled = true;
			Update = true;
		}

		private bool update = false;

		private void btnAdd_KeyPress(object sender, KeyEventArgs args)
		{
			if ((tbName.Text.Length > 0) && (tbFamilyName.Text.Length > 0))
			{
				lbNames.Items.Add(tbName.Text + " " + tbFamilyName.Text);
				tbName.Text				= "";
				tbFamilyName.Text		= "";
				btnAdd.ResponseScript	= "document.getElementById('" + tbFamilyName.ClientID + "').value = '';";
				DisableButtons();
				ResetControls();
			}
			else
			{
				HandleError();				
			}		
		}

		private void btnRemove_KeyPress(object sender, KeyEventArgs args)
		{
			lbNames.Items.RemoveAt(lbNames.SelectedIndex);
			btnRemove.Enabled = false;
			btnUpdate.Enabled = false;
			tbName.Text = "";
			tbFamilyName.Text = "";
		}

		private void btnUpdate_KeyPress(object sender, KeyEventArgs args)
		{
			if ((tbName.Text != string.Empty) && (tbFamilyName.Text != string.Empty))
			{
				lbNames.SelectedItem.Text = tbName.Text + " " + tbFamilyName.Text;
				btnRemove.Enabled = false;
				btnUpdate.Enabled = false;
				btnAdd.Enabled = false;
				tbName.Text = string.Empty;
				tbFamilyName.Text = string.Empty;
				Update = false;
			}
			else
			{
				HandleError();
			}
		}
	
		private bool Update
		{
			get
			{
				return ViewState["update"] != null ? (bool) ViewState["update"] : update;
			}
			set
			{
				ViewState["update"] = value;
				update = value;
			}
		}
		


	}
}