TextBox.Columns Properti
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Mendapatkan atau mengatur lebar tampilan kotak teks dalam karakter.
public:
virtual property int Columns { int get(); void set(int value); };
[System.ComponentModel.Bindable(true)]
public virtual int Columns { get; set; }
public virtual int Columns { get; set; }
[<System.ComponentModel.Bindable(true)>]
member this.Columns : int with get, set
member this.Columns : int with get, set
Public Overridable Property Columns As Integer
Nilai Properti
Lebar tampilan, dalam karakter, dari kotak teks. Defaultnya adalah 0, yang menunjukkan bahwa properti tidak diatur.
- Atribut
Pengecualian
Lebar yang ditentukan kurang dari 0.
Contoh
Contoh kode berikut menunjukkan cara menggunakan Columns properti untuk menentukan lebar 2 karakter untuk TextBox kontrol.
Penting
Contoh ini memiliki kotak teks yang menerima input pengguna, yang merupakan potensi ancaman keamanan. Secara default, ASP.NET halaman Web memvalidasi bahwa input pengguna tidak menyertakan elemen skrip atau HTML. Untuk informasi selengkapnya, lihat Gambaran Umum Eksploitasi Skrip.
<%@ 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">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title> TextBox Example </title>
<script runat="server">
protected void AddButton_Click(Object sender, EventArgs e)
{
int Answer;
Answer = Convert.ToInt32(Value1.Text) + Convert.ToInt32(Value2.Text);
AnswerMessage.Text = Answer.ToString();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<h3> TextBox 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>
<asp:TextBox ID="Value1"
Columns="2"
MaxLength="3"
Text="1"
runat="server"/>
</td>
<td>
+
</td>
<td>
<asp:TextBox ID="Value2"
Columns="2"
MaxLength="3"
Text="1"
runat="server"/>
</td>
<td>
=
</td>
<td>
<asp:Label 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:RangeValidator
ID="Value1RangeValidator"
ControlToValidate="Value1"
Type="Integer"
MinimumValue="1"
MaximumValue="100"
ErrorMessage="Please enter an integer <br /> between than 1 and 100.<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:RangeValidator
ID="Value2RangeValidator"
ControlToValidate="Value2"
Type="Integer"
MinimumValue="1"
MaximumValue="100"
ErrorMessage="Please enter an integer <br /> between than 1 and 100.<br />"
Display="Dynamic"
runat="server"/>
</td>
<td>
 
</td>
</tr>
<tr align="center">
<td colspan="4">
<asp:Button ID="AddButton"
Text="Add"
OnClick="AddButton_Click"
runat="server"/>
</td>
<td>
</td>
</tr>
</table>
</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">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title> TextBox Example </title>
<script runat="server">
Protected Sub AddButton_Click(sender As Object, e As EventArgs)
Dim Answer As Integer
Answer = Convert.ToInt32(Value1.Text) + Convert.ToInt32(Value2.Text)
AnswerMessage.Text = Answer.ToString()
End Sub
</script>
</head>
<body>
<form id="form1" runat="server">
<h3> TextBox 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>
<asp:TextBox ID="Value1"
Columns="2"
MaxLength="3"
Text="1"
runat="server"/>
</td>
<td>
+
</td>
<td>
<asp:TextBox ID="Value2"
Columns="2"
MaxLength="3"
Text="1"
runat="server"/>
</td>
<td>
=
</td>
<td>
<asp:Label 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:RangeValidator
ID="Value1RangeValidator"
ControlToValidate="Value1"
Type="Integer"
MinimumValue="1"
MaximumValue="100"
ErrorMessage="Please enter an integer <br /> between than 1 and 100.<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:RangeValidator
ID="Value2RangeValidator"
ControlToValidate="Value2"
Type="Integer"
MinimumValue="1"
MaximumValue="100"
ErrorMessage="Please enter an integer <br /> between than 1 and 100.<br />"
Display="Dynamic"
runat="server"/>
</td>
<td>
 
</td>
</tr>
<tr align="center">
<td colspan="4">
<asp:Button ID="AddButton"
Text="Add"
OnClick="AddButton_Click"
runat="server"/>
</td>
<td>
</td>
</tr>
</table>
</form>
</body>
</html>