c ++如何动态添加标签到组框并设置其位置

Question

大家好，我希望用户选择一个文件列表（txt 文件），我想在组框中显示这些文件的路径，我可以在 c# 中完美地做到这一点，但我在使用 c++ 时遇到了一些问题\客户端 p.s 我在 visual studio 2017 社区工作

这是我的代码：

openFileDialog1 = gcnew System::Windows::Forms::OpenFileDialog();
openFileDialog1->InitialDirectory = DefaultProgramPath;
openFileDialog1->FileName = "";
openFileDialog1->Filter = "ESA Files (*.esa)|*.esa|txt files (*.txt)|*.txt|All files (*.*)|*.*";
openFileDialog1->FilterIndex = 1;
openFileDialog1->RestoreDirectory = true;

if (openFileDialog1->ShowDialog() == System::Windows::Forms::DialogResult::OK)
{
    String^ toBeAdded= openFileDialog1->FileName;
    Label^job = gcnew  Label();
    job->Text = toBeAdded;

    job->Location.X = 150;
    job->Location.Y = 250;
    groupBox1->Controls->Add(job);
}

使用此代码，标签被添加到组框中但我无法在其中正确设置其位置

感谢您的帮助

Answer 1

System.Drawing.Point is a value type (struct in C#, value class/value struct in C++/CLI), therefore the property Location 正在返回其当前位置的 copy。为了更新它，您需要一次设置整个值类型。

Point newLocation;
newLocation.X = 150;
newLocation.Y = 250;
job->Location = newLocation;

c ++如何动态添加标签到组框并设置其位置

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