private bool GetDocuContent(out byte[] Content, out string FileName, out string ExtensionName) { long MaxLength = 10485760; //10M以内 Content = null; ExtensionName = string.Empty; FileName = string.Empty; OpenFileDialog vsOpenFileDialog = new OpenFileDialog(); vsOpenFileDialog.InitialDirectory = "d:\"; vsOpenFileDialog.Filter = "All files (*.*)|*.*"; vsOpenFileDialog.FilterIndex = 0; vsOpenFileDialog.Multiselect = false; try { if (vsOpenFileDialog.ShowDialog() == DialogResult.OK) { //Path.GetExtension方法:返回指定的路径字符串的扩展名 ExtensionName = Path.GetExtension(vsOpenFileDialog.FileName); //Path.GetFileName方法:返回指定路径字符串的文件名和扩展名。 FileName = Path.GetFileName(vsOpenFileDialog.FileName); FileInfo vsFileInfo = new FileInfo(vsOpenFileDialog.FileName); if (vsFileInfo.Length > MaxLength) { MessageBox.Show("文件超长!"); return false; } //vsFileInfo.OpenRead Method:Creates a read-only FileStream. FileStream fileStream = vsFileInfo.OpenRead(); if (fileStream.Length == 0) { MessageBox.Show("空文件!"); return false; } Content = new byte[fileStream.Length]; int Size = fileStream.Read(Content, 0, Convert.ToInt32(fileStream.Length)); fileStream.Close(); return true; } return false; } catch (Exception ex) { return false; } }
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小注:
1、 C# Winform OpenFileDialog 控件
2、C# FileStream.Read Method
假如选择的文件1111.png,是跟踪内容显示:
ExtensionName = Path.GetExtension(vsOpenFileDialog.FileName)
FileName = Path.GetFileName(vsOpenFileDialog.FileName)
FileInfo vsFileInfo = new FileInfo(vsOpenFileDialog.FileName)
Content = new byte[fileStream.Length]
4、假如相对返回的byte[] Content加密的话,可以使用:Convert.ToBase64String(Content),该函数的返回值,依然是:byte[]类型的。
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