首页 > 代码库 > 操作文件
操作文件
将指定文件夹中的文件大小、文件名称以及最后修改时间，并将记录到Excel中。
private delegate void UpdateControlPropertyDelegate(Control ctrl, string propertyName, params object[] args);
private UpdateControlPropertyDelegate _updateCtrlPropDelegate = null;
private DirectoryInfo _workingDirectoryInfo = null;
private string _searchFilePattern = "*.*";
public FrmExportMain()
{
InitializeComponent();
this._updateCtrlPropDelegate = new UpdateControlPropertyDelegate(UpdateControlPropertyMethod);
}
private void UpdateControlPropertyMethod(Control ctrl, string propertyName, params object[] args)
{
if (String.IsNullOrEmpty(propertyName))
{
ctrl.Update();
return;
}
if (args == null)return;
PropertyInfo[] props = ctrl.GetType().GetProperties();
foreach (PropertyInfo propInfo in props)
{
//查找目标控件的属性名称
if (propInfo.Name.Equals(propertyName, StringComparison.OrdinalIgnoreCase))
propInfo.SetValue(ctrl, args[0], null);
}
ctrl.Update();
}
/// <summary>
/// 提取文件信息
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnGetFileInfo_Click(object sender, EventArgs e)
{
if (System.IO.Directory.Exists(this.txtDirectoryName.Text) == false)
{
MessageBox.Show("当前选择的文件夹不存在，请重新选择！");
return;
}
this._workingDirectoryInfo = new DirectoryInfo(this.txtDirectoryName.Text);
this._searchFilePattern = this.txtSearchPattern.Text;
this.btnGetFileInfo.Enabled = false;
this.lblHint.Text = "";
this.lblHint.Visible = true;
BackgroundWorker backWorkderGetFileInfo = new System.ComponentModel.BackgroundWorker();
backWorkderGetFileInfo.DoWork += new DoWorkEventHandler(backWorkderGetFileInfo_DoWork);
backWorkderGetFileInfo.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backWorkderGetFileInfo_RunWorkerCompleted);
backWorkderGetFileInfo.RunWorkerAsync();
}
private void InvokeUpdateControlProperty(Control ctrl, string propertyName, params object[] args)
{
ctrl.Invoke(this._updateCtrlPropDelegate, new object[] { ctrl, propertyName, args });
}
private List GetDirectoryFileInfos(DirectoryInfo dirInfo)
{
if (dirInfo == null)return null;
List fileInfoList = new List();
DirectoryInfo[] subDirs = dirInfo.GetDirectories();
if (subDirs.Length > 0)
{
foreach (DirectoryInfo subDirInfo in subDirs)
{
InvokeUpdateControlProperty(this.lblHint, "Text", "正在获取文件夹【" + subDirInfo.Name + "】下文件信息，请稍等......");
fileInfoList.AddRange(GetDirectoryFileInfos(subDirInfo));
System.Threading.Thread.Sleep(1);//此句是重中之重，最关键的一句，降低了CPU的性能
}
}
fileInfoList.AddRange(dirInfo.GetFiles(this._searchFilePattern));
return fileInfoList;
}
public string ExcelReportFolderName
{
get
{
string currentAppPath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase;
string excelPath = Path.Combine(currentAppPath, "Reports");
if (Directory.Exists(excelPath) == false)
{
Directory.CreateDirectory(excelPath);
}
return excelPath;
}
}
private void backWorkderGetFileInfo_DoWork(object sender, DoWorkEventArgs e)
{
List fileInfoList = GetDirectoryFileInfos(this._workingDirectoryInfo);
InvokeUpdateControlProperty(this.lblHint, "Text", "正在生成Excel文件信息，请稍等......");
StringBuilder sb = new StringBuilder();
int index = 1;
sb.Append("<html><body><table><tr><td>序号</td><td>文件名</td><td>文件大小</td><td>最后修改时间</td></tr>");
foreach (FileInfo fileInfo in fileInfoList)
{
sb.Append("<tr><td>" + index + "</td><td>" + fileInfo.Name + "</td><td>" + fileInfo.Length + "</td><td>" + fileInfo.LastWriteTime + "</td></tr>");
index++;
}
sb.Append("");
string excelPath = ExcelReportFolderName;
string excelFileName = Path.Combine(excelPath, DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls");
StreamWriter logWriter = File.CreateText(excelFileName);
try
{
logWriter.WriteLine(sb.ToString());
}
finally
{
logWriter.Close();
}
}
private void backWorkderGetFileInfo_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
this.lblHint.Visible = false;
if (e.Error != null)
MessageBox.Show(e.Error.Message);
else
MessageBox.Show("获取文件信息成功！");
this.btnGetFileInfo.Enabled = true;
}
/// <summary>
/// 选择文件夹
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnSelectDirectory_Click(object sender, EventArgs e)
{
this.folderBrowserDialog1.SelectedPath = this.txtDirectoryName.Text;
if (this.folderBrowserDialog1.ShowDialog() == DialogResult.OK)
{
this.txtDirectoryName.Text = this.folderBrowserDialog1.SelectedPath;
}
}
/// <summary>
/// 打开报告文件夹
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnOpenReportFolder_Click(object sender, EventArgs e)
{
string filePath = ExcelReportFolderName;
Process open = new Process();
open.StartInfo.FileName = "explorer";
open.StartInfo.Arguments = filePath;
open.Start();
}
源码下载：http://files.cnblogs.com/alixee/ExportFileInfo%28%E4%BC%98%E5%8C%96%E5%90%8E%29.zip
操作文件