Winforms visualc&x2B+；获取文本框的路径和文件名

我想在VisualC++文本框（Windows窗体）中显示完整路径+名称+图像文件的扩展，当我尝试构建时，它失败了：
BR>

1>------ Build started: Project: Testing, Configuration: Debug Win32 ------
1>  Testing.cpp
1>Testing.obj : error LNK2020: unresolved token (06000003) Testing.Form1::GetFileName
1>c:\users\febri nur hidayat\documents\visual studio 2010\Projects\Testing\Debug\Testing.exe : fatal error LNK1120: 1 unresolved externals
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

以下是我的源代码：

private: System::Void textBox1_Click(System::Object^  sender, System::EventArgs^  e) {
    if(openFileDialog1->ShowDialog() == System::Windows::Forms::DialogResult::OK){
        this->pictureBox1->Image = Image::FromFile(openFileDialog1->FileName);
        String^ sourceImage;
        citra = Path::GetFileName(openFileDialog1->FileName);
        this->textBox1->Text = sourceImage;
    }
}

---

有什么建议或我应该编写什么代码吗？

无需调用

GetFileName

。只需执行以下操作：

this->textBox1->Text=openFileDialog1->FileName

仍不工作，致命错误LNK1120:1未解析外部：(