ASP.Net/Asp Control/Button

Содержание

1 Add action listener to a server Button (VB.net)
2 Add action listener to asp Button by delegate (C#)
3 asp:button: command name and arguments (VB.net)
4 asp:button event to change the label text (VB.net)
5 asp button on client click (C#)
6 asp button postbackurl (C#)
7 Button action Command and Parameter (VB.net)
8 Button counter: click and change button label (C#)
9 Button event Handler (C#)
10 CausesValidation="False"
11 Event driven page (VB.net)
12 Event in code behind file (VB.net)
13 OnClientClick event
14 onmouseover and onmouseout events
15 Read input and do the calculation in Button action listener (C#)
16 Calculator Version 1
17 Set Button text (VB.net)

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"> <asp:Label

   id="lblMessage" 
   Text="Press a button!"
   runat="server"

/>

<asp:Button

   id="butAlone"
   text="Alone Button"
   OnClick="SubmitBtn1_Click" 
   runat="server"

/>

</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>

   <title>Untitled Page</title>

</head> <body>

   <form runat="server">
       <asp:button id="Button1" runat="server" text="Button" />
       

       

       <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 & "
With this argument: " _
     & E.rumandArgument & "
"

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"

/>

<asp:button

   id="butSortName"
   text="Sort By Name"
   oncommand="CommandButton_Click"
   commandname="Sort"
   commandargument="By Name"
   runat="server"

/>

<asp:button

   id="butSortPrice"
   text="Sort By Price"
   oncommand="CommandButton_Click"
   commandname="Sort"
   commandargument="By Price"
   runat="server"

/>

<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">

<asp:Button id="Button1" onclick="Button1_Click" runat="server" Text="Button"></asp:Button>

<asp:Label id="Label1" runat="server">Label</asp:Label>

<asp:Label id="Label2" runat="server">Label</asp:Label>

   </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">

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

   </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">

   <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" />

   </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">

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

   </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"> <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"

/> </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">

   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" />

   </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>
       

       

       <asp:Button id="Button1" onclick="ClickHandler" runat="server" Text="Click here to submit"></asp:Button>
       

       

       <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">

       <asp:Label ID="Label2" 
                  runat="server" 
                  Text="Must Be a Date and Earlier than Today"></asp:Label>

       <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>

       <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" />

       <asp:ValidationSummary ID="ValidationSummary1" runat="server" ShowMessageBox="True" />
       <asp:ValidationSummary ID="ValidationSummary2" 
                              runat="server" 
                              ShowMessageBox="True"
                              ValidationGroup="DDL" />

   </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">

 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" />
   

   <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" />
   

   Answer = <asp:Label id="lblAnswer" runat="server" />
 </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">

<asp:label

   id="lblMessage1"
   runat="Server"

/>

<asp:label

   id="lblMessage2"
   runat="Server"

/>

Enter text to uppercase:
<asp:textbox

   id="txtUCase"
   runat="Server"

/>

Add Numbers:
<asp:textbox

   id="txtNumber1"
   runat="Server"

/>
<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">

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


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

   </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">

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

   </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">

Calculator Version 1

       <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>
       

       <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>
       

       Answer = <asp:Label id="lblAnswer" runat="server"></asp:Label>
   </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>

ASP.Net/Asp Control/Button

Содержание

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

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

asp:button: command name and arguments (VB.net)

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

asp button on client click (C#)

asp button postbackurl (C#)

Button action Command and Parameter (VB.net)

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

Button event Handler (C#)

CausesValidation="False"

Event driven page (VB.net)

Event in code behind file (VB.net)

OnClientClick event

onmouseover and onmouseout events

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

Calculator Version 1

Set Button text (VB.net)

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