I write a program to change from one language to another, the button and tabpage is ok to change, but the label's text couldn't change. Why? Please help me.

String^ vtest;
String^ vText;
String^ SelectCmd="Select * from ChineseToSChinese";
OleDbConnection^ MyConn20=gcnew OleDbConnection(ConnStr);
DataSet^ MyDataSet20=gcnew DataSet();
OleDbDataAdapter^ MyAdapter20=gcnew OleDbDataAdapter(SelectCmd,MyConn20);
MyAdapter20->Fill(MyDataSet20,"ChineseToSChinese");
SelectCmd="Select * from ChineseToEnglish";
OleDbConnection^ MyConn21=gcnew OleDbConnection(ConnStr);
DataSet^ MyDataSet21=gcnew DataSet();
OleDbDataAdapter^ MyAdapter21=gcnew OleDbDataAdapter(SelectCmd,MyConn21);
MyAdapter21->Fill(MyDataSet21,"ChineseToEnglish");
for (int i=0; i<Ctl->Controls->Count; i++) {
if (Ctl->Controls[i]->GetType() == Label::typeid) {
if (vLanguage==1) {
array<DataRow^>^ vRow=MyDataSet20->Tables["ChineseToSChinese"]->Select("Name='"+Ctl->Controls[i]->Text+"'");
if (vRow->Length>0)
Ctl->Controls[i]->Text="test"; <--couldn't change the label's text
//Ctl->Controls[i]->Text=(String^)vRow[0][1];
}
else if (vLanguage==2) {
array<DataRow^>^ vRow=MyDataSet20->Tables["ChineseToEnglish"]->Select("Name='"+Ctl->Controls[i]->Text+"'");
if (vRow->Length>0)
Ctl->Controls[i]->Text=(String^)vRow[0][1];
}
}
else if (Ctl->Controls[i]->GetType() == Button::typeid) {
array<DataRow^>^ vRow=MyDataSet20->Tables["ChineseToSChinese"]->Select("Name='"+Ctl->Controls[i]->Text+"'");
if (vRow->Length>0)
//Ctl->Controls[i]->Text=(String^)vRow[0][1];
Ctl->Controls[i]->Text="Test";<-- can change the text of button
}
else if (Ctl->Controls[i]->GetType() == ComboBox::typeid)
;
else if (Ctl->Controls[i]->GetType() == TabPage::typeid)
;
if (Ctl->Controls[i]->Controls->Count != 0)
TransText(Ctl->Controls[i]);
}
MyConn20->Close();
MyConn21->Close();

Hi,

Thank you for your reply!

I performed a test based on your sample code but didn't reproduce the problem on my side. In my test, I create a VC++ CLR Windows Forms Application project and add a Label control on the Form1. In the form's Load event handler, I add the following code:

private: System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e)
{
for(int i=0;i<this->Controls->Count;i++)
{
if(this->Controls[i]->GetType() == Label::typeid)
{
this->Controls[i]->Text = "hello world!";
}
}
}

When I run the application, the text on the label is "hello world".

Please set a breakpoint on the line of code "Ctl->Controls[i]->Text="test"; <--couldn't change the label's text" in your project and press F5 to run the application. Check whether this line of code is actually executed.

Sincerely,
Linda Liu

Hi,

You may set the Text property of a Label control at design time and open the form's designer file. Navigate to the InitializeComponent method to see how the Text property of the Label control is assigned.

Hope this helps.

Sincerely,
Linda Liu

I use the L"test", but it's the same couldn't change the label's text. I use the direct label's instruction to change the label's text. It works. Does it need some more skill.

Hi,

Thank you for your reply!

I performed a test based on your sample code but didn't reproduce the problem on my side. In my test, I create a VC++ CLR Windows Forms Application project and add a Label control on the Form1. In the form's Load event handler, I add the following code:

private: System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e)
{
for(int i=0;i<this->Controls->Count;i++)
{
if(this->Controls[i]->GetType() == Label::typeid)
{
this->Controls[i]->Text = "hello world!";
}
}
}

When I run the application, the text on the label is "hello world".

Please set a breakpoint on the line of code "Ctl->Controls[i]->Text="test"; <--couldn't change the label's text" in your project and press F5 to run the application. Check whether this line of code is actually executed.

Sincerely,
Linda Liu

Thanks a lot. It can work now.

Can I change the combobox's item same way as above.

I don't know why can't I change the text before. But NOW can change the text.It'sthe same as I wrote up.

String^ SelectCmd="Select * from ChineseToSChinese";
OleDbConnection^ MyConn20=gcnew OleDbConnection(ConnStr);
DataSet^ MyDataSet20=gcnew DataSet();
OleDbDataAdapter^ MyAdapter20=gcnew OleDbDataAdapter(SelectCmd,MyConn20);
MyAdapter20->Fill(MyDataSet20,"ChineseToSChinese");
SelectCmd="Select * from ChineseToEnglish";
OleDbConnection^ MyConn21=gcnew OleDbConnection(ConnStr);
DataSet^ MyDataSet21=gcnew DataSet();
OleDbDataAdapter^ MyAdapter21=gcnew OleDbDataAdapter(SelectCmd,MyConn21);
MyAdapter21->Fill(MyDataSet21,"ChineseToEnglish");
for (int i=0; i<Ctl->Controls->Count; i++) {
if (Ctl->Controls[i]->GetType() == Label::typeid || Ctl->Controls[i]->GetType() == Button::typeid || Ctl->Controls[i]->GetType() == TabPage::typeid) {
if (vLanguage==1) {
array<DataRow^>^ vRow=MyDataSet20->Tables["ChineseToSChinese"]->Select("Name='"+Ctl->Controls[i]->Text+"'");
if (vRow->Length>0)
Ctl->Controls[i]->Text=(String^)vRow[0][1];
else {
String^ InsertCmd="Insert into ChineseToSChinese(Name) Values('"+Ctl->Controls[i]->Text+"')";
OleDbConnection^ Conn10=gcnew OleDbConnection(ConnStr);
OleDbCommand^ Cmd=gcnew OleDbCommand(InsertCmd,Conn10);
Conn10->Open();
Cmd->ExecuteNonQuery();
Conn10->Close();
}
}
else if (vLanguage==2) {
array<DataRow^>^ vRow=MyDataSet20->Tables["ChineseToEnglish"]->Select("Name='"+Ctl->Controls[i]->Text+"'");
if (vRow->Length>0)
Ctl->Controls[i]->Text=(String^)vRow[0][1];
else {
String^ InsertCmd="Insert into ChineseToEnglish(Name) Values('"+Ctl->Controls[i]->Text+"')";
OleDbConnection^ Conn10=gcnew OleDbConnection(ConnStr);
OleDbCommand^ Cmd=gcnew OleDbCommand(InsertCmd,Conn10);
Conn10->Open();
Cmd->ExecuteNonQuery();
Conn10->Close();
}
}
}
else if (Ctl->Controls[i]->GetType() == ComboBox::typeid)
;
if (Ctl->Controls[i]->Controls->Count != 0)
TransText(Ctl->Controls[i]);
}
MyConn20->Close();
MyConn21->Close();