HtmlInputButton.OnServerClick メソッドとは? わかりやすく解説

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HtmlInputButton.OnServerClick メソッド

ServerClick イベント発生させます。これにより、イベント直接処理できます

名前空間: System.Web.UI.HtmlControls
アセンブリ: System.Web (system.web.dll 内)
構文構文

Protected Overridable Sub
 OnServerClick ( _
    e As EventArgs _
)
Dim e As EventArgs

Me.OnServerClick(e)
protected virtual void OnServerClick (
    EventArgs e
)
protected:
virtual void OnServerClick (
    EventArgs^ e
)
protected void OnServerClick (
    EventArgs e
)
protected function OnServerClick (
    e : EventArgs
)

パラメータ

e

イベント データ格納している System.EventArgs。

解説解説
使用例使用例

ServerClick イベントハンドラ指定およびコーディングする方法次のコード例示します。このイベント ハンドラは、ページ上の 2 つテキスト ボックスの値を加算しその結果表示します

<%@ Page Language="VB" AutoEventWireup="True"
 %>

<html> 

<head>

   <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>

</head>

<body>

   <form runat="server">

      <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">

               &nbsp;

            </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>

               &nbsp
 
            </td>

         </tr>

         <tr align="center">

            <td colspan="4">

               <input Type="Submit"
                      ID="SubmitButton"
                      Value="Add"
                      OnServerClick="AddButton_Click"
                      runat="server"/>

               &nbsp;&nbsp;&nbsp;

               <input Type="Reset"
                      ID="ResetButton"
                      Value="Reset"
                      runat="server"/>

            </td>

            <td>

               &nbsp;

            </td>

         </tr>

      </table>

   </form>

</body>
</html>
<%@ Page Language="C#" AutoEventWireup="True" %>

<html> 

<head>

   <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>

</head>

<body>

   <form runat="server">

      <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">

               &nbsp;

            </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>

               &nbsp
 
            </td>

         </tr>

         <tr align="center">

            <td colspan="4">

               <input Type="Submit"
                      ID="SubmitButton"
                      Value="Add"
                      OnServerClick="AddButton_Click"
                      runat="server"/>

               &nbsp;&nbsp;&nbsp;

               <input Type="Reset"
                      ID="ResetButton"
                      Value="Reset"
                      runat="server"/>

            </td>

            <td>

               &nbsp;

            </td>

         </tr>

      </table>

   </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  >
<head id="Head1" runat="server">
    <title>HtmlInputButton ServerClick Example</title>
</head>
<body>

   <form 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="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  >
<head runat="server">
    <title>HtmlInputButton ServerClick Example</title>
</head>

<body>

   <form runat="server">

      <h3> HtmlInputButton ServerClick Example </h3>

      <asp:PlaceHolder ID="ControlContainer"
           runat="server"/>

      <br><br>
 
      <span ID="Message"
            runat="server"/>

   </form>

</body>
</html>

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参照参照
関連項目
HtmlInputButton クラス
HtmlInputButton メンバ
System.Web.UI.HtmlControls 名前空間
ServerClick
System.EventArgs
その他の技術情報
HTML サーバー コントロール



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