ASP.Net/Page/Load Control
Содержание
Add asp:TextBox to page dynamically (VB.net)
<%@ 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 = "<BR><BR>"
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:<BR>
<asp:TextBox
id="txtNumber"
Columns="25"
MaxLength="3"
runat=server
/>
<BR><BR>
<asp:button
id="butOK"
text="OK"
Type="Submit"
OnClick="SubmitBtn_Click"
runat="server"
/>
<BR><BR>
</Form>
</BODY>
</HTML>
Find control in a page (C#)
<%@ 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">
<div>
<asp:Label
id="lblFirstName"
Text="First Name"
AssociatedControlID="txtFirstName"
Runat="server" />
<br />
<asp:TextBox
id="txtFirstName"
Runat="server" />
<asp:RequiredFieldValidator
id="reqFirstName"
ControlToValidate="txtFirstName"
Text="(Required)"
EnableClientScript="false"
Runat="server" />
<br /><br />
<asp:Label
id="lblLastName"
Text="Last Name"
AssociatedControlID="txtLastName"
Runat="server" />
<br />
<asp:TextBox
id="txtLastname"
Runat="server" />
<asp:RequiredFieldValidator
id="reqLastName"
ControlToValidate="txtLastName"
Text="(Required)"
EnableClientScript="false"
Runat="server" />
<br /><br />
<asp:Button
id="btnSubmit"
Text="Submit"
Runat="server" />
</div>
</form>
</body>
</html>
LoadControl method example (VB.net)
<%@ 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>
Pass parameter to page control (C#)
/*
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">
<div>
<user:PropertyRandomImage
ID="PropertyRandomImage1"
Runat="server" />
</div>
</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" />
<br />
<asp:Label
id="lblRandom"
Runat="server" />
--%>
Use propery defined in asp.net control (C#)
/*
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 = "<br />Billing Street: " + AddressForm1.Street;
ltlResults.Text += "<br />Billing City: " + AddressForm1.City;
ltlResults.Text += "<br />Billing State: " + AddressForm1.State;
ltlResults.Text += "<br />Billing Postal Code: " + AddressForm1.PostalCode;
ltlResults.Text += "<br /><br />";
// Show Shipping Address Form Results
ltlResults.Text += "<br />Shipping Street: " + AddressForm2.Street;
ltlResults.Text += "<br />Shipping City: " + AddressForm2.City;
ltlResults.Text += "<br />Shipping State: " + AddressForm2.State;
ltlResults.Text += "<br />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">
<div class="content">
<user:AddressForm
id="AddressForm1"
Title="Billing Address"
Runat="server" />
<br />
<user:AddressForm
id="AddressForm2"
Title="Shipping Address"
Runat="server" />
<br />
<asp:Button
ID="btnSubmit"
Text="Submit Form"
OnClick="btnSubmit_Click"
Runat="server" />
<hr />
<asp:Literal
id="ltlResults"
Runat="server" />
</div>
</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>
<div class="addressLabel">
<asp:Label
ID="lblStreet"
Text="Street:"
AssociatedControlID="txtStreet"
Runat="server" />
</div>
<div class="addressField">
<asp:TextBox
ID="txtStreet"
Runat="server" />
<asp:RequiredFieldValidator
ID="reqStreet"
Text="(required)"
ControlToValidate="txtStreet"
Runat="server" />
</div>
<br class="clear" />
<div class="addressLabel">
<asp:Label
ID="lblCity"
Text="City:"
AssociatedControlID="txtCity"
Runat="server" />
</div>
<div class="addressField">
<asp:TextBox
ID="txtCity"
Runat="server" />
<asp:RequiredFieldValidator
ID="reqCity"
Text="(required)"
ControlToValidate="txtCity"
Runat="server" />
</div>
<br class="clear" />
<div class="addressLabel">
<asp:Label
ID="lblState"
Text="State:"
AssociatedControlID="txtState"
Runat="server" />
</div>
<div class="addressField">
<asp:TextBox
ID="txtState"
Runat="server" />
<asp:RequiredFieldValidator
ID="reqState"
Text="(required)"
ControlToValidate="txtState"
Runat="server" />
</div>
<br class="clear" />
<div class="addressLabel">
<asp:Label
ID="lblPostalCode"
Text="Postal Code:"
AssociatedControlID="txtPostalCode"
Runat="server" />
</div>
<div class="addressField">
<asp:TextBox
ID="txtPostalCode"
Runat="server" />
<asp:RequiredFieldValidator
ID="RequiredFieldValidator1"
Text="(required)"
ControlToValidate="txtPostalCode"
Runat="server" />
</div>
<br class="clear" />
</fieldset>
--%>