в 15:30, 26 мая 2010

2010-05-26T15:30:47Z

Admin: 1 версия

2010-05-26T11:52:18Z

1 версия

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==Add action listener to a server Button (VB.net)==



<source lang="csharp">
<%@ Page Language=VB Debug=true %>
<script runat=server>
Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)
lblMessage.Text = "Press a button!"
End Sub
Sub SubmitBtn1_Click(Sender As Object, E As EventArgs)
lblMessage.Text = "You pressed the alone button."
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Button Controls Sample Page</TITLE>
</HEAD>
<BODY>
<form runat="server">
<Font Face="Tahoma" Size="+1">
<asp:Label
id="lblMessage"
Text="Press a button!"
runat="server"
/>
<BR><BR>
<asp:Button
id="butAlone"
text="Alone Button"
OnClick="SubmitBtn1_Click"
runat="server"
/>
<BR><BR>
</Font>
</Form>
</BODY>
</HTML>

</source>

==Add action listener to asp Button by delegate (C#)==



<source lang="csharp">
<%@ page language="C#" %>
<script runat="server">
void Page_Load (object sender, System.EventArgs e) {

this.Button1.Click += delegate(object dlgSender, EventArgs dlgE) {
Label1.Text = "you clicked the button!";
};
}
</script>
<html>
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form runat="server">
<asp:button id="Button1" runat="server" text="Button" />
<br />
<br />
<asp:label id="Label1" runat="server">Please click da button!</asp:label>
</form>
</body>
</html>

</source>

==asp:button: command name and arguments (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 CommandButton_Click(Sender As Object, E As CommandEventArgs)
lblButtonPressed.Text = "You pressed: " _
& E.rumandName & "<BR>With this argument: " _
& E.rumandArgument & "<BR>"
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Using a Button Control as a Command Button</TITLE>
</HEAD>
<form runat="server">
<asp:label
id="lblButtonPressed"
runat="server"
/>
<BR><BR>
<asp:button
id="butSortName"
text="Sort By Name"
oncommand="CommandButton_Click"
commandname="Sort"
commandargument="By Name"
runat="server"
/>
<BR><BR>
<asp:button
id="butSortPrice"
text="Sort By Price"
oncommand="CommandButton_Click"
commandname="Sort"
commandargument="By Price"
runat="server"
/>
<BR><BR>
<asp:button
id="lnkbutNewSearch"
text="New Search"
oncommand="CommandButton_Click"
commandname="New Search"
commandargument="None"
runat="server"
/>
</form>
</BODY>
</HTML>

</source>

==asp:button event to change the label text (VB.net)==



<source lang="csharp">
<%@ Page Language="VB" %>
<script runat="server">
Sub Button1_Click(sender As Object, e As EventArgs)

Label2.Text = "The button has been clicked"

End Sub

Sub Page_Load(sender As Object, e As EventArgs)

If Page.IsPostBack Then
Label1.Text = "The page has been loaded because of a button click"
Else
Label1.Text = "The page has been loaded for the first time"
End If
Label2.Text = ""

End Sub
</script>
<html>
<head>
</head>
<body>
<form runat="server">
<p>
<asp:Button id="Button1" onclick="Button1_Click" runat="server" Text="Button"></asp:Button>
</p>
<p>
<asp:Label id="Label1" runat="server">Label</asp:Label>
</p>
<p>
<asp:Label id="Label2" runat="server">Label</asp:Label>
</p>
</form>
</body>
</html>

</source>

==asp button on client click (C#)==



<source lang="csharp">
<%@ Page Language="C#" %>
<script runat="server">
protected void btnDelete_Click(object sender, EventArgs e)
{
lblResult.Text = "All pages deleted!";
}
</script>
<html>
<head>
<title>Button OnClientClick</title>
</head>
<body>
<form id="form1" runat="server">
<div>

<asp:Button
id="btnDelete"
Text="Delete Website"
OnClick="btnDelete_Click"
OnClientClick="return confirm("Are you sure?");"
Runat="server" />

<asp:Label
id="lblResult"
Runat="server" />

</div>
</form>
</body>
</html>

</source>

==asp button postbackurl (C#)==



<source lang="csharp">
<%@ Page Language="C#" %>
<html>
<head id="Head1" runat="server">
<title>Button Search</title>
</head>
<body>
<form id="form1" runat="server">
<div>

<asp:Label
id="lblSearch"
Text="Search:"
Runat="server" />
<asp:TextBox
id="txtSearch"
Runat="server" />
<asp:Button
id="btnSearch"
Text="Go!"
PostBackUrl="ButtonSearchResults.aspx"
Runat="server" />
</div>
</form>
</body>
</html>

<%--
<%@ Page Language="C#" %>
<script runat="server">
void Page_Load()
{
if (PreviousPage != null)
{
TextBox txtSearch = (TextBox)PreviousPage.FindControl("txtSearch");
lblSearch.Text = String.Format("Search For: {0}", txtSearch.Text);
}
}

</script>
<html>
<head>
<title>Button Search Results</title>
</head>
<body>
<form id="form1" runat="server">
<div>

<asp:Label
id="lblSearch"
Runat="server" />

</div>
</form>
</body>
</html>
--%>

</source>

==Button action Command and Parameter (VB.net)==



<source lang="csharp">
<%@ Page Language=VB Debug=true %>
<script runat=server>
Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)
lblMessage.Text = "Press a button!"
End Sub
Sub SubmitBtn2_Click(Sender As Object, E As CommandEventArgs)
lblMessage.Text = "The button you clicked: " _
& e.rumandName _
& ", has the following arguement: " _
& e.rumandArgument & "."
End Sub
</SCRIPT>
<HTML>
<HEAD>
<TITLE>Button Controls Sample Page</TITLE>
</HEAD>
<BODY>
<form runat="server">
<Font Face="Tahoma" Size="+1">
<asp:Label
id="lblMessage"
Text="Press a button!"
runat="server"
/>
<asp:Button
id="butAdd"
text="Add Record"
CommandName="Add"
CommandArgument="None"
OnCommand="SubmitBtn2_Click"
runat="server"
/>
<asp:Button
id="butEdit"
text="Edit Record"
CommandName="Edit"
CommandArgument="None"
OnCommand="SubmitBtn2_Click"
runat="server"
/>
<asp:Button
id="butSortA"
text="Sort A-Z"
CommandName="Sort"
CommandArgument="A"
OnCommand="SubmitBtn2_Click"
runat="server"
/>
<asp:Button
id="butSortD"
text="Sort Z-A"
CommandName="Sort"
CommandArgument="D"
OnCommand="SubmitBtn2_Click"
runat="server"
/>
</Font>
</Form>
</BODY>
</HTML>

</source>

==Button counter: click and change button label (C#)==



<source lang="csharp">
<%@ Page Language="C#" %>
<script runat="server">
protected void Button_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
btn.Text = (Int32.Parse(btn.Text) + 1).ToString();
}
</script>
<html>
<head>
<title>Button Counters</title>
</head>
<body>
<form id="form1" runat="server">
<div>
First Counter:
<asp:Button
id="Button1"
Text="0"
OnClick="Button_Click"
Runat="server" />

Second Counter:
<asp:Button
id="Button2"
Text="0"
OnClick="Button_Click"
Runat="server" />

</div>
</form>
</body>
</html>

</source>

==Button event Handler (C#)==



<source lang="csharp">
<%@ Page Language="C#" Debug="true"%>
<script runat="server">
void ClickHandler(object sender, EventArgs e)
{
if (ExtraInfoBox.Checked)
{
Message.Text = "You will hear from us shortly";
}
else
{
Message.Text = "You will not receive any further information from us";
}
}
</script>
<html>
<head>
</head>
<body>
<form runat="server">
<asp:CheckBox id="ExtraInfoBox" runat="server" Text="Click here to receive extra information"></asp:CheckBox>
<br />
<br />
<asp:Button id="Button1" onclick="ClickHandler" runat="server" Text="Click here to submit"></asp:Button>
<br />
<br />
<asp:Label id="Message" runat="server"></asp:Label>
</form>
</body>
</html>

</source>

==CausesValidation="False"==



<source lang="csharp">

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Default</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label2"
runat="server"
Text="Must Be a Date and Earlier than Today"></asp:Label><br />
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
<asp:CompareValidator ID="CompareValidator1"
runat="server"
ControlToValidate="TextBox2"
ErrorMessage="TextBox2 Must Be a Date and Earlier than Today"
Operator="LessThan"
SetFocusOnError="True"
Type="Date">*</asp:CompareValidator><br />
<asp:Button ID="Button1"
runat="server"
OnClick="Button1_Click"
Text="Submit" />
<asp:Button ID="Button2"
runat="server"
CausesValidation="False"
Text="Cancel - Will Not Validate!" />
<asp:Button ID="Button3"
runat="server"
Text="Validate DropDownList1 Only"
ValidationGroup="DDL" /><br />
<asp:ValidationSummary ID="ValidationSummary1" runat="server" ShowMessageBox="True" />
<asp:ValidationSummary ID="ValidationSummary2"
runat="server"
ShowMessageBox="True"
ValidationGroup="DDL" />
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
this.rupareValidator1.ValueToCompare = DateTime.Today.ToShortDateString();
}
protected void Button1_Click(object sender, EventArgs e)
{
this.Validate(string.Empty);
if (this.IsValid==false)
{
// Do something...
}
}
}
</source>

==Event driven page (VB.net)==



<source lang="csharp">
<script runat="server" language="vb">
Sub Add(sender as object, e As EventArgs)
lblAnswer.Text = CDbl(tbxInput1.text) + CDbl(tbxInput2.text)
End Sub
Sub Subtract(sender as object, e As EventArgs)
lblAnswer.Text = CDbl(tbxInput1.text) - CDbl(tbxInput2.text)
End Sub
Sub Factor(sender as object, e As EventArgs)
lblAnswer.Text = CDbl(tbxInput1.text) * CDbl(tbxInput2.text)
End Sub
Sub Ratio(sender as object, e As EventArgs)
lblAnswer.Text = CDbl(tbxInput1.text) / CDbl(tbxInput2.text)
End Sub
</script>
<html>
<form runat="server">
<asp:textbox id="tbxInput1" runat="server" />
<asp:button id="btnAdd" runat="server" text=" + " Onclick="Add" />
<asp:button id="btnSubtract" runat="server" text=" ?"
Onclick="Subtract" />
<br/>
<asp:textbox id="tbxInput2" runat="server" />
<asp:button id="btnFactor" runat="server" text=" x " Onclick="Factor" />
<asp:button id="btnRatio" runat="server" text=" ?" Onclick="Ratio" />
<br/>
<b>Answer = <asp:Label id="lblAnswer" runat="server" /></b>
</form>
</html>

</source>

==Event in code behind file (VB.net)==



<source lang="csharp">
<%@ Page
language=VB
debug=true
src="EventsInCodeBehind.vb"
Inherits="clsEventsInCodeBehind"
%>
<HTML>
<HEAD>
<TITLE>Inheriting Events in a Code-Behind Files</TITLE>
</HEAD>
<form runat="server">
<BR><BR>
<asp:label
id="lblMessage1"
runat="Server"
/>
<BR><BR>
<asp:label
id="lblMessage2"
runat="Server"
/>
<BR><BR>
Enter text to uppercase:
<BR>
<asp:textbox
id="txtUCase"
runat="Server"
/>
<BR><BR>
Add Numbers:
<BR>
<asp:textbox
id="txtNumber1"
runat="Server"
/>
<BR>
<asp:textbox
id="txtNumber2"
runat="Server"
/>
<asp:button
id="butAdd"
text="Add"
runat="server"
/>
</form>
</BODY>
</HTML>
<%--
Public Class clsEventsInCodeBehind
Inherits System.Web.UI.Page
Protected WithEvents txtUCase As _
System.Web.UI.WebControls.TextBox
Protected WithEvents txtNumber1 As _
System.Web.UI.WebControls.TextBox
Protected WithEvents txtNumber2 As _
System.Web.UI.WebControls.TextBox
Protected WithEvents lblMessage1 As _
System.Web.UI.WebControls.Label
Protected WithEvents lblMessage2 As _
System.Web.UI.WebControls.Label
Protected WithEvents butAdd As _
System.Web.UI.WebControls.Button
Private Sub Page_Init(ByVal sender As System.Object, _
ByVal e As System.EventArgs)
lblMessage1.Text = Date.Now
txtUcase.AutoPostBack = True
End Sub
Private Sub Page_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs)
lblMessage2.Text = Date.Now
End Sub
Sub txtUCase_Change(Sender As System.Object, _
E As System.EventArgs) Handles txtUCase.TextChanged
Dim TempString as String
TempString = txtUCase.Text
txtUCase.Text = TempString.ToUpper()
End Sub
Sub butAdd_Click(Sender As System.Object, _
E As System.EventArgs) Handles butAdd.Click
butAdd.Text = CSng(txtNumber1.Text) + CSng(txtNumber2.Text)
End Sub
End Class
--%>

</source>

==OnClientClick event==



<source lang="csharp">

<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Sub btnDelete_Click(sender AS Object, e As EventArgs)
lblResult.Text = "All pages deleted!"
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Button OnClientClick</title>
</head>
<body>
<form id="form1" runat="server">
<div>

<asp:Button
id="btnDelete"
Text="Delete Website"
OnClick="btnDelete_Click"
OnClientClick="return confirm("Are you sure?");"
Runat="server" />

<br /><br />

<asp:Label
id="lblResult"
Runat="server" />

</div>
</form>
</body>
</html>
</source>

==onmouseover and onmouseout events==



<source lang="csharp">

<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Button Expando</title>
</head>
<body>
<form id="form1" runat="server">
<div>

<asp:Button
id="btnSubmit"
Text="Submit"
onmouseover="this.value="Click Here!""
onmouseout="this.value="Submit""
Runat="server" />

</div>
</form>
</body>
</html>
</source>

==Read input and do the calculation in Button action listener (C#)==



<source lang="csharp">
<%@ Page Language="C#" Debug="True" %>
<script runat="server">
void Page_Load()
{
btnAdd.BackColor = System.Drawing.Color.LightGray;
btnSubtract.BackColor = System.Drawing.Color.LightGray;
btnMultiply.BackColor = System.Drawing.Color.LightGray;
btnDivide.BackColor = System.Drawing.Color.LightGray;
}

void Add(object sender, EventArgs e)
{
double answer = Convert.ToDouble(txtInput1.Text) +
Convert.ToDouble(txtInput2.Text);
lblAnswer.Text = answer.ToString();
btnAdd.BackColor = System.Drawing.Color.Yellow;
}

void Subtract(object sender, EventArgs e)
{
double answer = Convert.ToDouble(txtInput1.Text) -
Convert.ToDouble(txtInput2.Text);
lblAnswer.Text = answer.ToString();
btnSubtract.BackColor = System.Drawing.Color.Yellow;
}

void Multiply(object sender, EventArgs e)
{
double answer = Convert.ToDouble(txtInput1.Text) *
Convert.ToDouble(txtInput2.Text);
lblAnswer.Text = answer.ToString();
btnMultiply.BackColor = System.Drawing.Color.Yellow;
}

void Divide(object sender, EventArgs e)
{
double answer = Convert.ToDouble(txtInput1.Text) /
Convert.ToDouble(txtInput2.Text);
lblAnswer.Text = answer.ToString();
btnDivide.BackColor = System.Drawing.Color.Yellow;
}
</script>
<html>
<head>
<title>Calculator example v1</title>
</head>
<body>
<form runat="server">
<h2>Calculator Version 1
</h2>
<asp:TextBox id="txtInput1" runat="server"></asp:TextBox>
<asp:Button id="btnAdd" onclick="Add" runat="server" Text=" + "></asp:Button>
<asp:Button id="btnSubtract" onclick="Subtract" runat="server" Text=" - "></asp:Button>
<br />
<asp:TextBox id="txtInput2" runat="server"></asp:TextBox>
<asp:Button id="btnMultiply" onclick="Multiply" runat="server" Text=" x "></asp:Button>
<asp:Button id="btnDivide" onclick="Divide" runat="server" Text="/"></asp:Button>
<br />
<strong>Answer = <asp:Label id="lblAnswer" runat="server"></asp:Label></strong>
</form>
</body>
</html>

</source>

==Set Button text (VB.net)==



<source lang="csharp">
<%@ Page Language="VB" %>
<script language="vb" runat="server">
Sub Page_Load(Source As Object, E as EventArgs)
If Not IsPostBack Then
MyButton.Text = "OK"
MyDropDownList.Items.Add("http://www.nfex.ru")
MyDropDownList.Items.Add("http://www.google.ru")
End If
End Sub
</script>
<html>
<body>
<form id="WebForm1" method="post" runat="server">
<asp:DropDownList id=MyDropDownList runat="server"/>
<asp:button id=MyButton runat="server" Text=""/>
</form>
</body>
</html>

</source>

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ASP.Net/Asp Control/Button - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия