ASP.Net/Page/Load Control

Содержание

1 Add asp:TextBox to page dynamically (VB.net)
2 Find control in a page (C#)
3 LoadControl method example (VB.net)
4 Pass parameter to page control (C#)
5 Use propery defined in asp.net control (C#)

Add asp:TextBox to page dynamically (VB.net)

   <source lang="csharp">

<%@ Page Language=VB Debug=true %> <script runat=server> Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs) End Sub Sub SubmitBtn_Click(Sender As Object, E As EventArgs)

   Dim I as Integer
   For I = 1 to txtNumber.Text
       Dim MyTextBox = New TextBox
       MyTextBox.ID = "txtDynamic" & I
       MyTextBox.Text = "Control Number: " & I
       frmMyPage.Controls.Add(MyTextBox)
       Dim MyLiteral = New LiteralControl
       MyLiteral.Text = "

"
       frmMyPage.Controls.Add(MyLiteral)
   Next

End Sub </SCRIPT> <HTML> <HEAD> <TITLE>Creating a Basic TextBox Control</TITLE> </HEAD> <form

   id="frmMyPage"
   runat="server"

> Enter the number of TextBox controls you want:
<asp:TextBox

   id="txtNumber" 
   Columns="25"
   MaxLength="3"
   runat=server

/>

<asp:button

   id="butOK"
   text="OK"
   Type="Submit"
   OnClick="SubmitBtn_Click" 
   runat="server"

/>

</Form> </BODY> </HTML>

      </source>

Find control in a page (C#)

   <source lang="csharp">

<%@ Page Language="C#" %> <script runat="server">

   void Page_PreRender()
   {
       foreach (BaseValidator valControl in Page.Validators)
       {
           WebControl assControl = (WebControl)Page.FindControl(valControl.ControlToValidate);
           if (!valControl.IsValid)
               assControl.BackColor = System.Drawing.Color.Yellow;
           else
               assControl.BackColor = System.Drawing.Color.White;
       }
   }

</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server">

   <title>Show Validators</title>

</head> <body>

   <form id="form1" runat="server">

   <asp:Label
       id="lblFirstName"
       Text="First Name"
       AssociatedControlID="txtFirstName"
       Runat="server" />
   
    
   <asp:TextBox
       id="txtFirstName"
       Runat="server" />
   <asp:RequiredFieldValidator
       id="reqFirstName"
       ControlToValidate="txtFirstName"
       Text="(Required)"
       EnableClientScript="false"
       Runat="server" />   
    
   


       
   <asp:Label
       id="lblLastName"
       Text="Last Name"
       AssociatedControlID="txtLastName"
       Runat="server" />
   
    
   <asp:TextBox
       id="txtLastname"
       Runat="server" />
   <asp:RequiredFieldValidator
       id="reqLastName"
       ControlToValidate="txtLastName"
       Text="(Required)" 
       EnableClientScript="false"
       Runat="server" />   
    
    


    
    <asp:Button
       id="btnSubmit"
       Text="Submit"
       Runat="server" />

   </form>

</body> </html>

      </source>

LoadControl method example (VB.net)

   <source lang="csharp">

<%@ Page Language="vb" %> <html>

  <head>
     <title>LoadControl method example</title>
     <script runat="server">
        Sub Page_Load()
           Dim Hello As UserControl = LoadControl("BulletList.ascx")
           Page.Controls.Add(Hello)
        End Sub
     </script>
  </head>

<body>

  <asp:label id="Message" runat="server"/>

</body> </html>

      </source>

Pass parameter to page control (C#)

   <source lang="csharp">

/* ASP.NET 2.0 Unleashed (Unleashed) (Hardcover) by Stephen Walther

Publisher: Sams; Bk&CD-Rom edition (June 6, 2006)
Language: English
ISBN: 0672328232

/

<%@ Page Language="C#" %> <%@ Register TagPrefix="user" TagName="PropertyRandomImage" Src="PropertyRandomImage.ascx" %> <script runat="server">

   protected void Page_Load(object sender, EventArgs e)
   {
       PropertyRandomImage1.ImageFolderPath = ".";
   }

</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server">

   <title>Show Programmatic</title>

</head> <body>

   <form id="form1" runat="server">

   <user:PropertyRandomImage
       ID="PropertyRandomImage1"
       Runat="server" />

   </form>

</body> </html>

<%-- <%@ Control Language="C#" ClassName="PropertyRandomImage" %> <%@ Import Namespace="System.IO" %> <script runat="server">

   private string _imageFolderPath = "~/Images"; 
   public string ImageFolderPath
   {
       get { return _imageFolderPath; }
       set { _imageFolderPath = value; }
   }
   void Page_Load()
   {
       string imageToDisplay = GetRandomImage();
       imgRandom.ImageUrl = Path.rubine(_imageFolderPath, imageToDisplay);
       lblRandom.Text = imageToDisplay;
   }
   private string GetRandomImage()
   {
       Random rnd = new Random();
       string[] images = Directory.GetFiles(MapPath("."), "*.jpg");
       string imageToDisplay = images[rnd.Next(images.Length)];
       return Path.GetFileName(imageToDisplay);
   }

</script> <asp:Image

   id="imgRandom"
   Width="300px"
   Runat="server" />

<asp:Label

   id="lblRandom"
   Runat="server" />

--%>

      </source>

Use propery defined in asp.net control (C#)

   <source lang="csharp">

/* ASP.NET 2.0 Unleashed (Unleashed) (Hardcover) by Stephen Walther

Publisher: Sams; Bk&CD-Rom edition (June 6, 2006)
Language: English
ISBN: 0672328232

/

<%@ Page Language="C#" %> <%@ Register TagPrefix="user" TagName="AddressForm" Src="AddressForm.ascx" %> <script runat="server">

   protected void btnSubmit_Click(object sender, EventArgs e)
   {
       // Show Billing Address Form Results
       ltlResults.Text = "
Billing Street: " + AddressForm1.Street;
       ltlResults.Text += "
Billing City: " + AddressForm1.City;
       ltlResults.Text += "
Billing State: " + AddressForm1.State;
       ltlResults.Text += "
Billing Postal Code: " + AddressForm1.PostalCode;
       ltlResults.Text += "

";
       
       // Show Shipping Address Form Results
       ltlResults.Text += "
Shipping Street: " + AddressForm2.Street;
       ltlResults.Text += "
Shipping City: " + AddressForm2.City;
       ltlResults.Text += "
Shipping State: " + AddressForm2.State;
       ltlResults.Text += "
Shipping Postal Code: " + AddressForm2.PostalCode;
   }

</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server">

   <style type="text/css">
       html
       {
           background-color:silver;
           font:14px Georgia,Serif;
       }
       .content
       {
           background-color:white;
           width:600px;
           margin:auto;
           padding:20px;
       }
       .addressLabel
       {
           float:left;
           width:100px;
           padding:5px;
           text-align:right;
       }
       .addressField
       {
           float:left;
           padding:5px;
       }
       .clear
       {
           clear:both;
       }
   </style>
   <title>Checkout</title>

</head> <body>

   <form id="form1" runat="server">

   <user:AddressForm
       id="AddressForm1"
       Title="Billing Address"
       Runat="server" />
   

   <user:AddressForm
       id="AddressForm2"
       Title="Shipping Address"
       Runat="server" />
   

   
   <asp:Button
       ID="btnSubmit"
       Text="Submit Form"
       OnClick="btnSubmit_Click" 
       Runat="server" />

   <asp:Literal
       id="ltlResults"
       Runat="server" />

   </form>

</body> </html>

<%-- <%@ Control Language="C#" ClassName="AddressForm" %> <script runat="server">

   public string Title
   {
       get { return ltlTitle.Text; }
       set { ltlTitle.Text = value; }
   }
   public string Street
   {
       get { return txtStreet.Text; }
       set { txtStreet.Text = value; }
   }
   public string City
   {
       get { return txtCity.Text; }
       set { txtCity.Text = value; }
   }
   public string State
   {
       get { return txtState.Text; }
       set { txtState.Text = value; }
   }
   public string PostalCode
   {
       get { return txtPostalCode.Text; }
       set { txtPostalCode.Text = value; }
   }

</script> <fieldset> <legend>

   <asp:Literal 
       ID="ltlTitle"
       Text="Address Form" 
       runat="server" />

</legend>

<asp:Label

   ID="lblStreet"
   Text="Street:"
   AssociatedControlID="txtStreet"
   Runat="server" />

<asp:TextBox

   ID="txtStreet"
   Runat="server" />

<asp:RequiredFieldValidator

   ID="reqStreet"
   Text="(required)"
   ControlToValidate="txtStreet"
   Runat="server" />

<asp:Label

   ID="lblCity"
   Text="City:"
   AssociatedControlID="txtCity"
   Runat="server" />

<asp:TextBox

   ID="txtCity"
   Runat="server" />

<asp:RequiredFieldValidator

   ID="reqCity"
   Text="(required)"
   ControlToValidate="txtCity"
   Runat="server" />

<asp:Label

   ID="lblState"
   Text="State:"
   AssociatedControlID="txtState"
   Runat="server" />

<asp:TextBox

   ID="txtState"
   Runat="server" />

<asp:RequiredFieldValidator

   ID="reqState"
   Text="(required)"
   ControlToValidate="txtState"
   Runat="server" />

<asp:Label

   ID="lblPostalCode"
   Text="Postal Code:"
   AssociatedControlID="txtPostalCode"
   Runat="server" />

<asp:TextBox

   ID="txtPostalCode"
   Runat="server" />

<asp:RequiredFieldValidator

   ID="RequiredFieldValidator1"
   Text="(required)"
   ControlToValidate="txtPostalCode"
   Runat="server" />

</fieldset> --%>

      </source>

ASP.Net/Page/Load Control

Содержание

Add asp:TextBox to page dynamically (VB.net)

Find control in a page (C#)

LoadControl method example (VB.net)

Pass parameter to page control (C#)

Use propery defined in asp.net control (C#)

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