HtmlInputButton.OnServerClick(EventArgs) Método
Definição
Importante
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Aciona o evento ServerClick. Permite manipular o evento diretamente.
protected:
virtual void OnServerClick(EventArgs ^ e);protected virtual void OnServerClick (EventArgs e);abstract member OnServerClick : EventArgs -> unit
override this.OnServerClick : EventArgs -> unitProtected Overridable Sub OnServerClick (e As EventArgs)Parâmetros
Exemplos
O exemplo de código a seguir demonstra como especificar e codificar um manipulador para o ServerClick evento. O manipulador de eventos adiciona os valores das duas caixas de texto na página e exibe os resultados.
<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void AddButton_Click(Object sender, EventArgs e)
{
int Answer;
Answer = Convert.ToInt32(Value1.Value) + Convert.ToInt32(Value2.Value);
AnswerMessage.InnerHtml = Answer.ToString();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title> HtmlInputButton Example </title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3> HtmlInputButton Example </h3>
<table>
<tr>
<td colspan="5">
Enter integer values into the text boxes. <br />
Click the Add button to add the two values. <br />
Click the Reset button to reset the text boxes.
</td>
</tr>
<tr>
<td colspan="5">
</td>
</tr>
<tr align="center">
<td>
<input id="Value1"
type="Text"
size="2"
maxlength="3"
value="1"
runat="server"/>
</td>
<td>
+
</td>
<td>
<input id="Value2"
type="Text"
size="2"
maxlength="3"
value="1"
runat="server"/>
</td>
<td>
=
</td>
<td>
<span id="AnswerMessage"
runat="server"/>
</td>
</tr>
<tr>
<td colspan="2">
<asp:RequiredFieldValidator
ID="Value1RequiredValidator"
ControlToValidate="Value1"
ErrorMessage="Please enter a value.<br />"
Display="Dynamic"
runat="server"/>
<asp:CompareValidator
ID="Value1MinCompareValidator"
ControlToValidate="Value1"
Operator="LessThan"
Type="Integer"
ValueToCompare="100"
ErrorMessage="Please enter an integer less than 100.<br />"
Display="Dynamic"
runat="server"/>
<asp:CompareValidator
ID="Value1MaxCompareValidator"
ControlToValidate="Value1"
Operator="GreaterThan"
Type="Integer"
ValueToCompare="0"
ErrorMessage="Please enter an integer greater than 0.<br />"
Display="Dynamic"
runat="server"/>
</td>
<td colspan="2">
<asp:RequiredFieldValidator
ID="Value2RequiredValidator"
ControlToValidate="Value2"
ErrorMessage="Please enter a value.<br />"
Display="Dynamic"
runat="server"/>
<asp:CompareValidator
ID="Value2MinCompareValidator"
ControlToValidate="Value2"
Operator="LessThan"
Type="Integer"
ValueToCompare="100"
ErrorMessage="Please enter an integer less than 100.<br />"
Display="Dynamic"
runat="server"/>
<asp:CompareValidator
ID="Value2MaxCompareValidator"
ControlToValidate="Value2"
Operator="GreaterThan"
Type="Integer"
ValueToCompare="0"
ErrorMessage="Please enter an integer greater than 0.<br />"
Display="Dynamic"
runat="server"/>
</td>
<td>
</td>
</tr>
<tr align="center">
<td colspan="4">
<input type="Submit"
id="SubmitButton"
value="Add"
onserverclick="AddButton_Click"
runat="server"/>
<input type="Reset"
id="ResetButton"
value="Reset"
runat="server"/>
</td>
<td>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Protected Sub AddButton_Click(sender As Object, e As EventArgs)
Dim Answer As Integer
Answer = Convert.ToInt32(Value1.Value) + Convert.ToInt32(Value2.Value)
AnswerMessage.InnerHtml = Answer.ToString()
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title> HtmlInputButton Example </title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3> HtmlInputButton Example </h3>
<table>
<tr>
<td colspan="5">
Enter integer values into the text boxes. <br />
Click the Add button to add the two values. <br />
Click the Reset button to reset the text boxes.
</td>
</tr>
<tr>
<td colspan="5">
</td>
</tr>
<tr align="center">
<td>
<input id="Value1"
type="Text"
size="2"
maxlength="3"
value="1"
runat="server"/>
</td>
<td>
+
</td>
<td>
<input id="Value2"
type="Text"
size="2"
maxlength="3"
value="1"
runat="server"/>
</td>
<td>
=
</td>
<td>
<span id="AnswerMessage"
runat="server"/>
</td>
</tr>
<tr>
<td colspan="2">
<asp:RequiredFieldValidator
ID="Value1RequiredValidator"
ControlToValidate="Value1"
ErrorMessage="Please enter a value.<br />"
Display="Dynamic"
runat="server"/>
<asp:CompareValidator
ID="Value1MinCompareValidator"
ControlToValidate="Value1"
Operator="LessThan"
Type="Integer"
ValueToCompare="100"
ErrorMessage="Please enter an integer less than 100.<br />"
Display="Dynamic"
runat="server"/>
<asp:CompareValidator
ID="Value1MaxCompareValidator"
ControlToValidate="Value1"
Operator="GreaterThan"
Type="Integer"
ValueToCompare="0"
ErrorMessage="Please enter an integer greater than 0.<br />"
Display="Dynamic"
runat="server"/>
</td>
<td colspan="2">
<asp:RequiredFieldValidator
ID="Value2RequiredValidator"
ControlToValidate="Value2"
ErrorMessage="Please enter a value.<br />"
Display="Dynamic"
runat="server"/>
<asp:CompareValidator
ID="Value2MinCompareValidator"
ControlToValidate="Value2"
Operator="LessThan"
Type="Integer"
ValueToCompare="100"
ErrorMessage="Please enter an integer less than 100.<br />"
Display="Dynamic"
runat="server"/>
<asp:CompareValidator
ID="Value2MaxCompareValidator"
ControlToValidate="Value2"
Operator="GreaterThan"
Type="Integer"
ValueToCompare="0"
ErrorMessage="Please enter an integer greater than 0.<br />"
Display="Dynamic"
runat="server"/>
</td>
<td>
</td>
</tr>
<tr align="center">
<td colspan="4">
<input type="Submit"
id="SubmitButton"
value="Add"
onserverclick="AddButton_Click"
runat="server"/>
<input type="Reset"
id="ResetButton"
value="Reset"
runat="server"/>
</td>
<td>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
// Create a new HtmlInputButton control.
HtmlInputButton NewButtonControl = new HtmlInputButton("submit");
// Set the properties of the new HtmlInputButton control.
NewButtonControl.ID = "NewButtonControl";
NewButtonControl.Value = "Click Me";
// Create an EventHandler delegate for the method you want to handle the event
// and then add it to the list of methods called when the event is raised.
NewButtonControl.ServerClick += new System.EventHandler(this.Button_Click);
// Add the new HtmlInputButton control to the Controls collection of the
// PlaceHolder control.
ControlContainer.Controls.Add(NewButtonControl);
}
void Button_Click(Object sender, EventArgs e)
{
// Display a simple message.
Message.InnerHtml = "Thank you for clicking the button.";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>HtmlInputButton ServerClick Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3> HtmlInputButton ServerClick Example </h3>
<asp:PlaceHolder ID="ControlContainer"
runat="server"/>
<br /><br />
<span id="Message"
runat="server"/>
</form>
</body>
</html>
<%@ 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 Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Create a new HtmlInputButton control.
Dim NewButtonControl As New HtmlInputButton()
' Set the properties of the new HtmlInputButton control.
NewButtonControl.ID = "NewButtonControl"
NewButtonControl.Value = "Click Me"
' Create an EventHandler delegate for the method you want to handle the event
' and then add it to the list of methods called when the event is raised.
AddHandler NewButtonControl.ServerClick, AddressOf Button_Click
' Add the new HtmlInputButton control to the Controls collection of the
' PlaceHolder control.
ControlContainer.Controls.Add(NewButtonControl)
End Sub
Sub Button_Click(ByVal sender As Object, ByVal e As EventArgs)
' Display a simple message.
Message.InnerHtml = "Thank you for clicking the button."
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>HtmlInputButton ServerClick Example</title>
</head>
<body>
<form id="form1" runat="server">
<h3> HtmlInputButton ServerClick Example </h3>
<asp:PlaceHolder ID="ControlContainer"
runat="server"/>
<br /><br />
<span id="Message"
runat="server"/>
</form>
</body>
</html>
Comentários
O ServerClick evento é gerado quando um HtmlInputButton controle é clicado.
Observação
Um botão Redefinir não aciona o ServerClick evento.
Ao criar um HtmlInputButton delegado, você identifica o método que manipulará o evento. Para associar o evento ao manipulador de eventos, adicione uma instância do delegado ao evento. O manipulador de eventos é chamado sempre que o evento ocorre, a menos que você remova o representante. Para obter mais informações sobre delegados do manipulador de eventos, consulte Manipulando e levantando eventos.
Aplica-se a
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