MyEasyTools：哈希值计算器（MD5+SHA1）

学习下WPF，顺便用WPF把WinForm的程序改成了WPF，功能和MFC版功能基本相同

主要代码：

1 设置DataGrid的Style

        <Style x:Key="Body_Content_DataGrid_Centering" TargetType="{x:Type DataGridCell}">            <Style.Triggers>                <Trigger Property="IsSelected" Value="True">                    <Setter Property="Background" Value="ForestGreen"/>                </Trigger>            </Style.Triggers>            <Setter Property="Template">                <Setter.Value>                    <ControlTemplate TargetType="{x:Type DataGridCell}">                        <Grid Background="{TemplateBinding Background}">                            <ContentPresenter VerticalAlignment="Center" />                        </Grid>                    </ControlTemplate>                </Setter.Value>            </Setter>            <Setter Property="FontSize" Value="13" />        </Style>

                    <DataGrid Grid.Row="0" Name="dgHashInfo"                                                            AutoGenerateColumns="False"                               HeadersVisibility="All" RowHeaderWidth="18" RowHeight="25"                              SelectionMode="Extended"                               SelectionUnit="FullRow"                              CanUserSortColumns="False"                               CanUserResizeRows="False"                              CanUserAddRows="False"                              AllowDrop="True"                               DragEnter="dgHashInfo_DragEnter"                               DragOver="dgHashInfo_DragEnter"                              Drop="dgHashInfo_Drop"                               LoadingRow="dgHashInfo_LoadingRow"                              CellStyle="{StaticResource Body_Content_DataGrid_Centering}"                              ItemsSource="{Binding}" >                        <DataGrid.RowStyle>                            <Style TargetType="DataGridRow">                                <Style.Triggers>                                    <Trigger Property="IsMouseOver" Value="True">                                        <Setter Property="Background" Value="DeepSkyBlue" />                                        <Setter Property="Foreground" Value="White" />                                    </Trigger>                                </Style.Triggers>                            </Style>                        </DataGrid.RowStyle>                        <DataGrid.RowHeaderStyle>                            <Style TargetType="DataGridRowHeader">                                                                <Setter Property="FontSize" Value="13"/>                                <Setter Property="Width" Value="20"/>                                <Setter Property="Background">                                    <Setter.Value>                                        <LinearGradientBrush StartPoint="0,0" EndPoint="1,1">                                            <GradientStop Color="White" Offset="0"/>                                            <GradientStop Color="SkyBlue" Offset="1"/>                                        </LinearGradientBrush>                                    </Setter.Value>                                </Setter>                                <Style.Triggers>                                    <Trigger Property="IsMouseOver" Value="True">                                        <Setter Property="ToolTip" Value="Select this row"/>                                    </Trigger>                                </Style.Triggers>                            </Style>                        </DataGrid.RowHeaderStyle>                        <DataGrid.ContextMenu>                            <ContextMenu Name="cmRighMenu" StaysOpen="True" >                                <MenuItem Name="cmAddNewRow" Header="Add new row" Click="cmAddNewRow_Click" />                            </ContextMenu>                                                    </DataGrid.ContextMenu>                        <DataGrid.Columns>                            <DataGridTextColumn Header="File Attribute" Width="*" Binding="{Binding Attribute, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" IsReadOnly="True" />                            <DataGridTextColumn Header="Attribute Value" Width="4*" Binding="{Binding Value, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />                        </DataGrid.Columns>                    </DataGrid>

2 进度条的控制

        private bool InitProgressBar(string filePath)        {            bool result = true;            string key = GenerateNameByHashCode(filePath);            if (htProgressBar.ContainsKey(key))            {                result = false;                Warnning("Wait for this file calculate completely");            }            else            {                ProgressBar pb = new ProgressBar();                pb.IsIndeterminate = false;                pb.Orientation = Orientation.Horizontal;                pb.Width = 100;                pb.Height = sbStatus.ActualHeight - 5;                pb.Minimum = 0;                pb.Maximum = 100;                pb.Value = 0;                pb.Visibility = Visibility.Visible;                sbStatus.Items.Add(pb);                htProgressBar.Add(key, pb);            }            return result;        }

        private void UpdateHashInfo(FileHashInfo fileHashInfo)        {            MethodInvokerWithOnePara miProgress = new MethodInvokerWithOnePara(ProgressPerformStep);            Dispatcher.Invoke(miProgress, new object[] { fileHashInfo });            if (fileHashInfo.Percent == 100)            {                MethodInvokerWithOnePara miHashInfo = new MethodInvokerWithOnePara(AddFileHashInfo);                Dispatcher.Invoke(miHashInfo, new object[] { fileHashInfo });            }        }        private void ProgressPerformStep(FileHashInfo fileHashInfo)        {            string key = GenerateNameByHashCode(fileHashInfo.Path);            ProgressBar pb = htProgressBar[key] as ProgressBar;            double value = fileHashInfo.Percent;            if ((value == -1) || (value >= pb.Maximum))            {                ClearProgressBar(key);            }            else            {                if (value > pb.Value)                {                    pb.SetValue(ProgressBar.ValueProperty, value);                }            }        }        private void ClearProgressBar(string key)        {            ProgressBar pb = htProgressBar[key] as ProgressBar;            if (null != pb)            {                sbStatus.Items.Remove(pb);                htProgressBar.Remove(key);            }        }

3 Drag-Drop文件功能实现

        private void rtbSourceText_PreviewDragEnter(object sender, DragEventArgs e)        {            if (e.Data.GetDataPresent(DataFormats.FileDrop))            {                e.Effects = DragDropEffects.Copy;                e.Handled = true;            }            else            {                e.Effects = DragDropEffects.None;            }        }        private void rtbSourceText_PreviewDrop(object sender, DragEventArgs e)        {            string filePath = ((Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();            if (!File.Exists(filePath))            {                if (Directory.Exists(filePath))                {                    Warnning("Does not support directory");                }                else                {                    Warnning("File not find");                }                return;            }            else            {                FileInfo fi = new FileInfo(filePath);                if (fi.Extension != ".txt")                {                    Warnning("Only support text file");                    return;                }            }            StreamReader sr = new StreamReader(filePath);            string content = sr.ReadToEnd();            rtbSourceText.AppendText(content);        }

NOTE：结合1 中的绿色背景代码才可以工作

4 计算MD5/SHA1

        public void GetFileHashInfo(string path, CalculateProgressHandle progress)        {            fileHashInfo = new FileHashInfo();            bStopCalc = false;            fileHashInfo.Path = path;            fileHashInfo.Size = GetFileSize(path);            fileHashInfo.LastModifyTime = GetFileTime(path);            ChangeProgress = progress;            AsyncGetHashValue(path);        }        private void AsyncGetHashValue(string path)        {            try            {                int bufferSize = 1024 * 1024 * 10; //10M                buffer = new byte[bufferSize];                //open file stream                inputStream = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Read);                hashAlgorithm_MD5 = new MD5CryptoServiceProvider();                hashAlgorithm_SHA1 = new SHA1CryptoServiceProvider();                //async read first data into buffer                inputStream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(AsyncComputeHashCallback), null);            }            catch            {                //            }        }        private void AsyncComputeHashCallback(IAsyncResult result)        {            int bytesRead = inputStream.EndRead(result);            if (inputStream.Length == 0)            {                fileHashInfo.Percent = 100;            }            else            {                fileHashInfo.Percent = (int)((double)inputStream.Position / inputStream.Length * 100);            }            if (inputStream.Position < inputStream.Length)            {                if (bStopCalc)                {                    fileHashInfo.Percent = -1;                    if (null != ChangeProgress)                    {                        ChangeProgress(fileHashInfo);                    }                    return;                }                //caculate hash value                var output = new byte[buffer.Length];                hashAlgorithm_MD5.TransformBlock(buffer, 0, buffer.Length, output, 0);                hashAlgorithm_SHA1.TransformBlock(buffer, 0, buffer.Length, output, 0);                //async read next data into buffer                inputStream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(AsyncComputeHashCallback), null);            }            else            {                //caculate last block hash value                hashAlgorithm_MD5.TransformFinalBlock(buffer, 0, bytesRead);                hashAlgorithm_SHA1.TransformFinalBlock(buffer, 0, bytesRead);                fileHashInfo.MD5 = BitConverter.ToString(hashAlgorithm_MD5.Hash).Replace("-", "");                fileHashInfo.SHA1 = BitConverter.ToString(hashAlgorithm_SHA1.Hash).Replace("-", "");                inputStream.Close();            }            if (null != ChangeProgress)            {                ChangeProgress(fileHashInfo);            }        }        public static void StopCalculate()        {            bStopCalc = true;        }

单线程同步计算MD5

        private static string GetMD5(string path)        {            string sMD5Value = string.Empty;            Stream file = GetStream(path);            MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();            byte[] bMD5 = md5.ComputeHash(file);            sMD5Value = System.BitConverter.ToString(bMD5);            sMD5Value = sMD5Value.Replace("-", "");            return sMD5Value;        }

如果完全转载，请注明出处，谢谢