ErrorProvider Demo
[STAThreadAttribute]
int main(array<System::String ^> ^args)
{
Application::Run(gcnew Form1());
return 0;
}
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
}
private:
System::Windows::Forms::TextBox^ tbPword;
System::Windows::Forms::Label^ lbPword;
System::Windows::Forms::Button^ bnLogin;
System::Windows::Forms::TextBox^ tbName;
System::Windows::Forms::Label^ lbName;
System::Windows::Forms::ErrorProvider^ eProvider;
void InitializeComponent(void)
{
this->tbPword = (gcnew System::Windows::Forms::TextBox());
this->lbPword = (gcnew System::Windows::Forms::Label());
this->bnLogin = (gcnew System::Windows::Forms::Button());
this->tbName = (gcnew System::Windows::Forms::TextBox());
this->lbName = (gcnew System::Windows::Forms::Label());
this->eProvider =(gcnew System::Windows::Forms::ErrorProvider());
(cli::safe_cast<System::ComponentModel::ISupportInitialize^>
(this->eProvider))->BeginInit();
this->SuspendLayout();
//
// tbPword
//
this->tbPword->Location = System::Drawing::Point(103, 83);
this->tbPword->Name = L"tbPword";
this->tbPword->PasswordChar = '*';
this->tbPword->Size = System::Drawing::Size(100, 20);
this->tbPword->TabIndex = 9;
this->tbPword->Validating +=
gcnew System::ComponentModel::CancelEventHandler(this,
&Form1::textbox_Validating);
//
// lbPword
//
this->lbPword->AutoSize = true;
this->lbPword->Location = System::Drawing::Point(34, 83);
this->lbPword->Name = L"lbPword";
this->lbPword->Size = System::Drawing::Size(53, 13);
this->lbPword->TabIndex = 8;
this->lbPword->Text = L"&Password";
//
// bnLogin
//
this->bnLogin->Location = System::Drawing::Point(75, 131);
this->bnLogin->Name = L"bnLogin";
this->bnLogin->Size = System::Drawing::Size(75, 23);
this->bnLogin->TabIndex = 7;
this->bnLogin->Text = L"&Login";
this->bnLogin->Click +=
gcnew System::EventHandler(this, &Form1::login_Click);
//
// tbName
//
this->tbName->Location = System::Drawing::Point(103, 31);
this->tbName->Name = L"tbName";
this->tbName->Size = System::Drawing::Size(100, 20);
this->tbName->TabIndex = 6;
this->tbName->Validating +=
gcnew System::ComponentModel::CancelEventHandler(this,
&Form1::textbox_Validating);
//
// lbName
//
this->lbName->AutoSize = true;
this->lbName->Location = System::Drawing::Point(34, 31);
this->lbName->Name = L"lbName";
this->lbName->Size = System::Drawing::Size(35, 13);
this->lbName->TabIndex = 5;
this->lbName->Text = L"&Name";
//
// eProvider
//
this->eProvider->ContainerControl = this;
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(237, 185);
this->Controls->Add(this->tbPword);
this->Controls->Add(this->lbPword);
this->Controls->Add(this->bnLogin);
this->Controls->Add(this->tbName);
this->Controls->Add(this->lbName);
this->Name = L"Form1";
this->Text = L"System Login";
(cli::safe_cast<System::ComponentModel::ISupportInitialize^>
(this->eProvider))->EndInit();
this->ResumeLayout(false);
this->PerformLayout();
}
System::Void textbox_Validating(System::Object^ sender,
System::ComponentModel::CancelEventArgs^ e)
{
try
{
TextBox ^tb = (TextBox^)(sender);
if (tb->Text->Equals(""))
eProvider->SetError(tb, "**Error** Missing Entry!");
else
eProvider->SetError(tb, "");
}
catch (Exception^)
{
// Not TextBox
}
}
System::Void login_Click(System::Object^ sender, System::EventArgs^ e)
{
if (tbName->Text->Equals(""))
eProvider->SetError(tbName, "**Error** Missing Entry!");
else
eProvider->SetError(tbName, "");
if (tbPword->Text->Equals(""))
{
// Place the icon left side of control
eProvider->SetIconAlignment(tbPword,
ErrorIconAlignment::MiddleLeft);
eProvider->SetError(tbPword, "**Error** Missing Entry!");
}
else
eProvider->SetError(tbPword, "");
}
};
}