HtmlInputControl.Value 属性
定义
获取或设置与 HtmlInputControl 控件关联的值。Gets or sets the value associated with the HtmlInputControl control.
public:
virtual property System::String ^ Value { System::String ^ get(); void set(System::String ^ value); };
public virtual string Value { get; set; }
member this.Value : string with get, set
Public Overridable Property Value As String
属性值
与 HtmlInputControl 关联的值。The value associated with the HtmlInputControl.
示例
下面的代码示例演示如何使用 Value 属性来确定用户在某些文本框中输入的文本。The following code example demonstrates how to use the Value property to determine the text that the user entered into some text boxes.
<%@ 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> HtmlInputText Example </title>
</head>
<body>
<form id="form1" runat="server">
<div>
<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>
</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> HtmlInputText Example </title>
</head>
<body>
<form id="form1" runat="server">
<div>
<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>
</div>
</form>
</body>
</html>
注解
使用此属性可指定或确定与该控件关联的值 HtmlInputControl 。Use this property to specify or determine the value associated with the HtmlInputControl control. Value属性等效于 value HTML 元素的属性。The Value property is equivalent to the value attribute of HTML elements.