HtmlInputText.Value-Eigenschaft
Ruft den Inhalt des Textfelds ab oder legt diesen fest.
Namespace: System.Web.UI.HtmlControls
Assembly: System.Web (in system.web.dll)
Syntax
'Declaration
Public Overrides Property Value As String
'Usage
Dim instance As HtmlInputText
Dim value As String
value = instance.Value
instance.Value = value
public override string Value { get; set; }
public:
virtual property String^ Value {
String^ get () override;
void set (String^ value) override;
}
/** @property */
public String get_Value ()
/** @property */
public void set_Value (String value)
public override function get Value () : String
public override function set Value (value : String)
Eigenschaftenwert
Der im Textfeld enthaltene Text. Der Standardwert ist eine leere Zeichenfolge ("").
Hinweise
Mit der Value-Eigenschaft können Sie programmgesteuert den Text ermitteln, den der Benutzer in das Textfeld eingegeben hat. Sie können diese Eigenschaft auch zum Bereitstellen von Standardtext für das Textfeld verwenden.
Hinweis
Wenn Sie einen Wert für ein HtmlInputText-Steuerelement vom Typ password angeben, wird dieser Wert nicht im Textfeld angezeigt.
Beispiel
Im folgenden Codebeispiel wird veranschaulicht, wie mithilfe der Value-Eigenschaft programmgesteuert der Text ermittelt wird, den der Benutzer in das Textfeld 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
HtmlInputText-Klasse
HtmlInputText-Member
System.Web.UI.HtmlControls-Namespace
HtmlInputPassword-Klasse