HtmlInputControl.Value-Eigenschaft
Ruft den Wert ab, der dem HtmlInputControl-Steuerelement zugeordnet ist, oder legt diesen fest.
Namespace: System.Web.UI.HtmlControls
Assembly: System.Web (in system.web.dll)
Syntax
'Declaration
Public Overridable Property Value As String
'Usage
Dim instance As HtmlInputControl
Dim value As String
value = instance.Value
instance.Value = value
public virtual string Value { get; set; }
public:
virtual property String^ Value {
String^ get ();
void set (String^ value);
}
/** @property */
public String get_Value ()
/** @property */
public void set_Value (String value)
public function get Value () : String
public function set Value (value : String)
Eigenschaftenwert
Der dem HtmlInputControl zugeordnete Wert.
Hinweise
Mit dieser Eigenschaft können Sie den Wert angeben oder bestimmen, der dem HtmlInputControl-Steuerelement zugeordnet ist. Die Value-Eigenschaft ist gleichbedeutend mit dem value-Attribut von HTML-Elementen.
Beispiel
Im folgenden Codebeispiel wird veranschaulicht, wie mit der Value-Eigenschaft bestimmt werden kann, welchen Text der Benutzer in Textfeldern eingegeben hat.
<%@ 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> HtmlInputText 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"
Name="AddButton"
Value="Add"
OnServerClick="AddButton_Click"
runat="server"/>
<input Type="Reset"
Name="AddButton"
Value="Reset"
runat="server"/>
</td>
<td>
</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> HtmlInputText 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"
Name="AddButton"
Value="Add"
OnServerClick="AddButton_Click"
runat="server"/>
<input Type="Reset"
Name="AddButton"
Value="Reset"
runat="server"/>
</td>
<td>
</td>
</tr>
</table>
</form>
</body>
</html>
Plattformen
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
Siehe auch
Referenz
HtmlInputControl-Klasse
HtmlInputControl-Member
System.Web.UI.HtmlControls-Namespace