实现效果:
知识运用:
string类的SubString方法
public string SubString(int startIndex,int Length)
实现代码:
private void button1_Click(object sender, EventArgs e) { OpenFileDialog P_OpenfileDialog = new OpenFileDialog(); if (P_OpenfileDialog.ShowDialog() == DialogResult.OK) { MessageBox.Show("拓展名为:"+ P_OpenfileDialog.FileName.Substring( P_OpenfileDialog.FileName.LastIndexOf('.')+1, P_OpenfileDialog.FileName.Length- P_OpenfileDialog.FileName.LastIndexOf('.')-1),"提示:"); } }