如何检查文件夹中是否存在文本框中的值

Question

目前，我正在使用C＃（Windows窗体）开发图像加载系统。 如果在文本框中输入的值存在或不存在于文件夹中，则如何启用/禁用搜索按钮存在问题。 我希望如果文件夹中不存在文本框中的值，则无法单击搜索按钮；如果文本框中存在的值，则可以单击搜索按钮。 问题是即使我输入的值存在于文件夹中也无法单击按钮搜索。 请有人帮我。 这是我的代码：

 private void textBoxEmpNo_TextChanged(object sender, EventArgs e)
 {

        string baseFolder = @"\\\\egmnas01\\hr\\photo";

        string checkEmpNo = "*" + textBoxEmpNo.Text + "*.jpg";

        bool fileFound = false;

        DirectoryInfo di = new DirectoryInfo(baseFolder);


        foreach (var folderName in baseFolder)
        {
          var path = Path.Combine(baseFolder, checkEmpNo);

          if (File.Exists(checkEmpNo))
          {
            buttonSearch.Enabled = true;

            fileFound = true;
            break;
            //If you want to stop looking, break; here 
           }
         }
         if (!fileFound)
         {
           //Display message that No such image found
           buttonSearch.Enabled = false;
         }
    }

Answer 1

尝试使用以下内容。

//Search for the filename that you have entered in textBoxempNo.

string[] fileFound = Directory.GetFiles(baseFolder, "*" + textBoxEmpNo.Text 
+ "*.jpeg", SearchOption.AllDirectories)

//Then check if there are files found.

`if (fileFound.Length ==0 )
{
  buttonSearch.Enabled = false;
}
else
{
  buttonSearch.Enabled = true;
}`

Answer 2

 private void textBoxEmpNo_TextChanged(object sender, EventArgs e)
        {
            bool fileFound = false;
            const string baseFolder = @"\\\\egmnas01\\hr\\photo";

            string[] matchedFiles = Directory.GetFiles(baseFolder, "*" + textBoxEmpNo.Text + "*.jpeg", SearchOption.AllDirectories);

            if (matchedFiles.Length == 0)
            {
                buttonSearch.Enabled = false;
            }
            else
            {
                buttonSearch.Enabled = true;
                fileFound = true;
            }
        }

解决Adriano Repetti的建议。

 private void textBoxEmpNo_TextChanged(object sender, EventArgs e)
        {
            bool fileFound = false;
            const string baseFolder = @"C:\Users\matesush\Pictures";

            if (Directory.EnumerateFiles(baseFolder, "*" + textBoxEmpNo.Text + "*.jpeg", SearchOption.AllDirectories).Any())
            {
                buttonSearch.Enabled = true;
                fileFound = true;
            }
            else
            {
                buttonSearch.Enabled = false;
            }
        }