연습: 개체를 사용하여 대화 상자 정보를 집합적으로 검색
업데이트: 2007년 11월
대부분의 Windows Forms 대화 상자에는 정보를 부모 폼에 노출하는 속성이 있습니다. 여러 속성을 만드는 대신 부모 폼에서 필요한 모든 정보를 저장하는 클래스 개체를 만들어 단일 대화 상자 속성을 통해 관련 데이터 그룹을 노출할 수 있습니다.
다음 연습에서는 이름 및 전자 메일 주소 데이터가 포함된 UserInformation 속성을 노출하는 대화 상자를 만들어 대화 상자를 닫은 후에도 부모 폼에서 사용할 수 있도록 합니다.
개체를 통해 데이터를 노출하는 대화 상자를 만들려면
Visual Studio에서 DialogBoxObjects라는 새 Windows Forms 프로젝트를 만듭니다. 자세한 내용은 방법: Windows 응용 프로그램 프로젝트 만들기를 참조하십시오.
새 Form을 프로젝트에 추가하고 이름을 InformationForm으로 지정합니다. 자세한 내용은 방법: 프로젝트에 Windows Forms 추가를 참조하십시오.
도구 상자에서 TableLayoutPanel을 폼으로 끌어 옵니다. 컨트롤 옆에 화살표로 표시되는 스마트 태그를 사용하여 테이블에 세 번째 행을 추가하고 세 개의 행이 모두 같도록 마우스를 사용하여 행의 크기를 조정합니다.
Label을 첫 번째 열의 각 테이블 셀에 추가하고 TextBox를 두 번째 열의 각 셀에 추가합니다. Label 컨트롤은 위에서 아래쪽으로 firstNameLabel, lastNameLabel 및 emailLabel로 이름을 지정해야 합니다. TextBox 컨트롤은 firstNameText, lastNameText 및 emailText로 이름을 지정해야 합니다. 작업을 마치면 Button 컨트롤을 추가합니다. 해당 컨트롤의 이름을 okButton으로 지정하고 Text 속성을 OK로 변경합니다.
UserInformation이라는 새 클래스 파일을 프로젝트에 추가합니다.
클래스가 네임스페이스 외부에 표시되도록 public 한정자를 클래스 정의에 추가하고 FirstName, LastName 및 EmailAddress 속성에 대한 속성 정의를 추가합니다. 작업을 마치면 작성된 코드는 다음과 비슷합니다.
Public Class UserInformation
Private _FirstName As String = ""
Private _LastName As String = ""
Private _EmailAddress As String = ""
Public Property FirstName() As String
Get
Return _FirstName
End Get
Set(ByVal value As String)
_FirstName = value
End Set
End Property
Public Property LastName() As String
Get
Return _LastName
End Get
Set(ByVal value As String)
_LastName = value
End Set
End Property
Public Property EmailAddress() As String
Get
Return _EmailAddress
End Get
Set(ByVal value As String)
_EmailAddress = value
End Set
End Property
End Class
using System;
using System.Collections.Generic;
using System.Text;
namespace DialogBoxObjects
{
public class UserInformation
{
private string _firstName = "";
private string _lastName = "";
private string _emailAddress = "";
public string FirstName
{
get
{
return (_firstName);
}
set
{
_firstName = value;
}
}
public string LastName
{
get
{
return (_lastName);
}
set
{
_lastName = value;
}
}
public string EmailAddress
{
get
{
return (_emailAddress);
}
set
{
_emailAddress = value;
}
}
}
}
using namespace System;
using namespace System::Collections::Generic;
using namespace System::Text;
namespace DialogBoxObjects
{
public ref class UserInformation
{
public:
UserInformation()
{
firstNameValue = "";
lastNameValue = "";
emailAddressValue = "";
}
private:
String^ firstNameValue;
private:
String^ lastNameValue;
private:
String^ emailAddressValue;
public:
property String^ FirstName
{
String^ get()
{
return firstNameValue;
}
void set( String^ value )
{
firstNameValue = value;
}
}
public:
property String^ LastName
{
String^ get()
{
return lastNameValue;
}
void set( String^ value )
{
lastNameValue = value;
}
}
public:
property String^ EmailAddress
{
String^ get()
{
return emailAddressValue;
}
void set( String^ value )
{
emailAddressValue = value;
}
}
};
}
- InformationForm의 코드로 돌아가서 UserInformation 속성을 추가합니다.
Public ReadOnly Property UserInformation() As UserInformation
Get
Return _UI
End Get
End Property
public UserInformation UserInformation
{
get
{
return (_ui);
}
}
public:
property DialogBoxObjects::UserInformation^ UserInformation
{
DialogBoxObjects::UserInformation^ get()
{
return this->userInformation;
}
}
Private Sub FirstNameText_Validated(ByVal sender As Object, ByVal e As EventArgs) Handles FirstNameText.Validated
Dim FirstNameTemp As String = FirstNameText.Text.Trim()
If FirstNameText.Text.Trim().Length > 0 Then
_UI.FirstName = FirstNameTemp
End If
End Sub
Private Sub LastNameText_Validated(ByVal sender As Object, ByVal e As EventArgs) Handles LastNameText.Validated
Dim LastNameTemp As String = LastNameText.Text.Trim()
If LastNameText.Text.Trim().Length > 0 Then
_UI.LastName = LastNameTemp
End If
End Sub
Private Sub EmailText_Validated(ByVal sender As Object, ByVal e As EventArgs) Handles EmailText.Validated
Dim EmailTemp As String = EmailText.Text.Trim()
If EmailTemp.Length > 0 Then
_UI.EmailAddress = EmailTemp
End If
End Sub
public InformationForm()
{
InitializeComponent();
firstNameText.Validated += new EventHandler(firstNameText_Validated);
lastNameText.Validated += new EventHandler(lastNameText_Validated);
emailText.Validated += new EventHandler(emailText_Validated);
}
void firstNameText_Validated(object sender, EventArgs e)
{
string firstNameTemp = firstNameText.Text.Trim();
if (firstNameText.Text.Trim().Length > 0)
{
_ui.FirstName = firstNameTemp;
}
}
void lastNameText_Validated(object sender, EventArgs e)
{
string lastNameTemp = lastNameText.Text.Trim();
if (lastNameText.Text.Trim().Length > 0)
{
_ui.LastName = lastNameTemp;
}
}
void emailText_Validated(object sender, EventArgs e)
{
string emailTemp = emailText.Text.Trim();
if (emailTemp.Length > 0)
{
_ui.EmailAddress = emailTemp;
}
}
private:
void FirstNameText_Validated(Object^ sender, EventArgs^ e)
{
String^ firstName = firstNameText->Text->Trim();
if (firstName->Length > 0)
{
userInformation->FirstName = firstName;
}
}
private:
void LastNameText_Validated(Object^ sender, EventArgs^ e)
{
String^ lastName = lastNameText->Text->Trim();
if (lastName->Length > 0)
{
userInformation->LastName = lastName;
}
}
private:
void EmailText_Validated(Object^ sender, EventArgs^ e)
{
String^ email = emailText->Text->Trim();
if (email->Length > 0)
{
userInformation->EmailAddress = email;
}
}
private:
void CloseFormButton_Click(Object^ sender, EventArgs^ e)
{
if (userInformation->FirstName->Length == 0)
{
MessageBox::Show("First name cannot be zero-length.");
return;
}
if (userInformation->LastName->Length == 0)
{
MessageBox::Show("Last name cannot be zero-length.");
return;
}
if (userInformation->EmailAddress->Length == 0)
{
MessageBox::Show("Email address cannot be zero-length.");
return;
}
this->DialogResult = ::DialogResult::OK;
this->Hide();
}
#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private:
void InitializeComponent()
{
this->tableLayoutPanel1 =
gcnew System::Windows::Forms::TableLayoutPanel();
this->firstNameLabel = gcnew System::Windows::Forms::Label();
this->lastNameLabel = gcnew System::Windows::Forms::Label();
this->emailLabel = gcnew System::Windows::Forms::Label();
this->firstNameText = gcnew System::Windows::Forms::TextBox();
this->lastNameText = gcnew System::Windows::Forms::TextBox();
this->emailText = gcnew System::Windows::Forms::TextBox();
this->closeFormButton = gcnew System::Windows::Forms::Button();
this->tableLayoutPanel1->SuspendLayout();
this->SuspendLayout();
//
// tableLayoutPanel1
//
this->tableLayoutPanel1->ColumnCount = 2;
this->tableLayoutPanel1->ColumnStyles->Add(
gcnew System::Windows::Forms::ColumnStyle(
System::Windows::Forms::SizeType::Percent, 33.98533F));
this->tableLayoutPanel1->ColumnStyles->Add(
gcnew System::Windows::Forms::ColumnStyle(
System::Windows::Forms::SizeType::Percent, 66.01467F));
this->tableLayoutPanel1->Controls->Add(this->firstNameLabel, 0, 0);
this->tableLayoutPanel1->Controls->Add(this->lastNameLabel, 0, 1);
this->tableLayoutPanel1->Controls->Add(this->emailLabel, 0, 2);
this->tableLayoutPanel1->Controls->Add(this->firstNameText, 1, 0);
this->tableLayoutPanel1->Controls->Add(this->lastNameText, 1, 1);
this->tableLayoutPanel1->Controls->Add(this->emailText, 1, 2);
this->tableLayoutPanel1->Location = System::Drawing::Point(33, 30);
this->tableLayoutPanel1->Name = "tableLayoutPanel1";
this->tableLayoutPanel1->RowCount = 3;
this->tableLayoutPanel1->RowStyles->Add(
gcnew System::Windows::Forms::RowStyle(
System::Windows::Forms::SizeType::Percent, 50.0F));
this->tableLayoutPanel1->RowStyles->Add(
gcnew System::Windows::Forms::RowStyle(
System::Windows::Forms::SizeType::Percent, 50.0F));
this->tableLayoutPanel1->RowStyles->Add(
gcnew System::Windows::Forms::RowStyle(
System::Windows::Forms::SizeType::Absolute, 41.0F));
this->tableLayoutPanel1->Size = System::Drawing::Size(658, 116);
this->tableLayoutPanel1->TabIndex = 0;
//
// firstNameLabel
//
this->firstNameLabel->Anchor =
System::Windows::Forms::AnchorStyles::None;
this->firstNameLabel->AutoSize = true;
this->firstNameLabel->Location = System::Drawing::Point(82, 11);
this->firstNameLabel->Name = "firstNameLabel";
this->firstNameLabel->Size = System::Drawing::Size(59, 14);
this->firstNameLabel->TabIndex = 0;
this->firstNameLabel->Text = "First Name";
//
// lastNameLabel
//
this->lastNameLabel->Anchor =
System::Windows::Forms::AnchorStyles::None;
this->lastNameLabel->AutoSize = true;
this->lastNameLabel->Location = System::Drawing::Point(82, 48);
this->lastNameLabel->Name = "lastNameLabel";
this->lastNameLabel->Size = System::Drawing::Size(59, 14);
this->lastNameLabel->TabIndex = 1;
this->lastNameLabel->Text = "Last Name";
//
// emailLabel
//
this->emailLabel->Anchor =
System::Windows::Forms::AnchorStyles::None;
this->emailLabel->AutoSize = true;
this->emailLabel->Location = System::Drawing::Point(73, 88);
this->emailLabel->Name = "emailLabel";
this->emailLabel->Size = System::Drawing::Size(77, 14);
this->emailLabel->TabIndex = 2;
this->emailLabel->Text = "Email Address";
//
// firstNameText
//
this->firstNameText->Anchor =
System::Windows::Forms::AnchorStyles::None;
this->firstNameText->Location = System::Drawing::Point(339, 8);
this->firstNameText->Name = "firstNameText";
this->firstNameText->Size = System::Drawing::Size(203, 20);
this->firstNameText->TabIndex = 3;
//
// lastNameText
//
this->lastNameText->Anchor =
System::Windows::Forms::AnchorStyles::None;
this->lastNameText->Location = System::Drawing::Point(339, 45);
this->lastNameText->Name = "lastNameText";
this->lastNameText->Size = System::Drawing::Size(202, 20);
this->lastNameText->TabIndex = 4;
//
// emailText
//
this->emailText->Anchor =
System::Windows::Forms::AnchorStyles::None;
this->emailText->Location = System::Drawing::Point(336, 85);
this->emailText->Name = "emailText";
this->emailText->Size = System::Drawing::Size(208, 20);
this->emailText->TabIndex = 5;
//
// closeFormButton
//
this->closeFormButton->Location = System::Drawing::Point(550, 211);
this->closeFormButton->Name = "closeFormButton";
this->closeFormButton->Size = System::Drawing::Size(141, 23);
this->closeFormButton->TabIndex = 1;
this->closeFormButton->Text = "OK";
this->closeFormButton->Click += gcnew System::EventHandler(this,
&InformationForm::CloseFormButton_Click);
//
// InformationForm
//
this->AutoScaleDimensions = System::Drawing::SizeF(6.0F, 13.0F);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(744, 258);
this->Controls->Add(this->closeFormButton);
this->Controls->Add(this->tableLayoutPanel1);
this->Name = "InformationForm";
this->Text = "User Information";
this->tableLayoutPanel1->ResumeLayout(false);
this->tableLayoutPanel1->PerformLayout();
this->ResumeLayout(false);
}
#pragma endregion
public:
InformationForm()
{
userInformation = gcnew DialogBoxObjects::UserInformation;
components = nullptr;
InitializeComponent();
firstNameText->Validated += gcnew EventHandler
(this, &InformationForm::FirstNameText_Validated);
lastNameText->Validated += gcnew EventHandler(this,
&InformationForm::LastNameText_Validated);
emailText->Validated += gcnew EventHandler(this,
&InformationForm::EmailText_Validated);
}
- Validated 이벤트의 처리기를 사용자 폼의 각 TextBox 컨트롤에 추가하면 사용자가 해당 컨트롤을 변경할 때마다 이러한 컨트롤의 새 값이 UserInformation에 할당됩니다.
Private Sub closeFormButton_Click(ByVal sender As Object, ByVal e As EventArgs)
If _UI.FirstName.Length = 0 Then
MessageBox.Show("First name cannot be zero-length.")
Exit Sub
End If
If _UI.LastName.Length = 0 Then
MessageBox.Show("Last name cannot be zero-length.")
Exit Sub
End If
If _UI.EmailAddress.Length = 0 Then
MessageBox.Show("Email address cannot be zero-length.")
Exit Sub
End If
Me.DialogResult = System.Windows.Forms.DialogResult.OK
Me.Close()
End Sub
private void closeFormButton_Click(object sender, EventArgs e)
{
if (_ui.FirstName.Length == 0)
{
MessageBox.Show("First name cannot be zero-length.");
return;
}
if (_ui.LastName.Length == 0)
{
MessageBox.Show("Last name cannot be zero-length.");
return;
}
if (_ui.EmailAddress.Length == 0)
{
MessageBox.Show("Email address cannot be zero-length.");
return;
}
this.DialogResult = DialogResult.OK;
this.Hide();
}
private:
void CloseFormButton_Click(Object^ sender, EventArgs^ e)
{
if (userInformation->FirstName->Length == 0)
{
MessageBox::Show("First name cannot be zero-length.");
return;
}
if (userInformation->LastName->Length == 0)
{
MessageBox::Show("Last name cannot be zero-length.");
return;
}
if (userInformation->EmailAddress->Length == 0)
{
MessageBox::Show("Email address cannot be zero-length.");
return;
}
this->DialogResult = ::DialogResult::OK;
this->Hide();
}
만든 대화 상자를 표시하고 개체를 사용하여 데이터를 검색하려면
Visual Studio에서 Form1을 선택합니다. Button을 폼에 추가하고 해당 Name 속성을 showFormButton으로 변경합니다.
단추를 두 번 클릭하여 대화 상자를 호출하는 이벤트 처리기를 추가하고 결과를 표시합니다.
Private Sub ShowFormButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ShowFormButton.Click
Dim InfoForm As New InformationForm()
Dim dr As DialogResult = InfoForm.ShowDialog()
If dr = System.Windows.Forms.DialogResult.OK Then
Dim Txt As String = "First Name: " & InfoForm.UserInformation.FirstName + ControlChars.Cr + ControlChars.Lf
Txt &= "Last Name: " & InfoForm.UserInformation.LastName + ControlChars.Cr + ControlChars.Lf
Txt &= "Email Address: " & InfoForm.UserInformation.EmailAddress
MessageBox.Show(Txt)
End If
InfoForm.Dispose()
End Sub
참고 항목
작업
방법: 여러 속성을 사용하여 대화 상자 정보를 선택적으로 검색