搜索照片和进度条显示
Search photos and progressbar display
我有一个带有搜索按钮和进度条的表单，用于在网络目录中查找照片。
它 returns 一个错误：
System.Reflection.TargetInvocationException
HResult=0x80131604
Message=O destino de uma invocação accionou uma excepção.
Source=mscorlib
StackTrace:
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at _myprogram.Program.Main() in C:\Users\folder\Desktop\folder\folder\V10\folder\Program.cs:line 19
Inner Exception 1:
ArgumentOutOfRangeException: O índice estava fora do intervalo. Tem de ser não negativo e inferior ao tamanho da colecção.
Nome do parâmetro: índex
代码如下：
public partial class FormProcuraFotos : Form
{
public FormProcuraFotos()
{
InitializeComponent();
}
// We create the DataTable here so we can create the new inside the Worker_DoWork and use it also on the Worker_RunWorkerCompleted
DataTable tableWithPhotos;
private void button1_Click(object sender, EventArgs e)
{
// Make the progressBar1 to look like its allways loading something
progressBar1.Style = ProgressBarStyle.Marquee;
// Make it here visible
progressBar1.Visible = true;
var worker = new BackgroundWorker();
// Event that runs on background
worker.DoWork += this.Worker_DoWork;
// Event that will run after the background event as finnished
worker.RunWorkerCompleted += this.Worker_RunWorkerCompleted;
worker.RunWorkerAsync();
}
// The reason for having this here was to work with the progress bar and to search for the photos and it will not block the UI Thread
// My advice is to have them here and pass them to the next form with a constructor
private void Worker_DoWork(object sender, DoWorkEventArgs e)
{
// We must create a list for all the files that the search it will find
List<string> filesList = new List<string>();
// Create the new DataTable to be used
tableWithPhotos = new DataTable();
tableWithPhotos.Columns.Add("Nome e formato do ficheiro (duplo clique para visualizar a imagem)");
tableWithPhotos.Columns.Add("Caminho ( pode ser copiado Ctrl+C )");
// What folders that we want to search for the files
var diretorios = new List<string>() { @"C:\Users\folder\Pictures" };
// What extensions that we want to search
var extensoes = new List<string>() { ".jpg", ".bmp", ".png", ".tiff", ".gif" };
// This 2 foreach are to search for the files with the extension that is on the extensoes and on all directories that are on diretorios
// In for foreach we go through all the extensions that we want to search
foreach (string entryExtensions in extensoes)
{
// Now we must go through all the directories to search for the extension that is on the entryExtensions
foreach (string entryDirectory in diretorios)
{
// SearchOption.AllDirectories search the directory and sub directorys if necessary
// SearchOption.TopDirectoryOnly search only the directory
filesList.AddRange(Directory.GetFiles(entryDirectory, entryExtensions, SearchOption.AllDirectories));
}
}
// And now here we will add all the files that it has found into the DataTable
foreach (string entryFiles in filesList)
{
DataRow row = tableWithPhotos.NewRow();
row[0] = Path.GetFileName(entryFiles);
row[1] = entryFiles;
tableWithPhotos.Rows.Add(row);
}
}
private void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
// With the new constructor on the FormResultadosFotos, we pass the table like this so the form can receive it
progressBar1.Visible = false;
var NovoForm = new FormResultadosFotos(tableWithPhotos);
NovoForm.Show();
}
}
}
我有另一种形式在 datagridview 上显示这些结果（这个 datagridview 有一个图片框，如果用户双击则显示照片）
这是代码：
public partial class FormResultadosFotos : Form
{
// This is the constructor that we have added to the FormResultadosFotos so it can receive the DataTable that was created on the previous form
public FormResultadosFotos(DataTable table)
{
InitializeComponent();
dataGridView1.DataSource = table;
dataGridView1.Columns[1].Visible = true;
// What can be done here to not block the UI thread if is being blocked while populating the dataGridView1, is to create another BackgroundWorker here and populate the dataGridView1 there
}
}
}
是否可以帮助我并指出问题所在？谢谢。
我会将 ProgressBar 更改为像这样继续 progressBar1.Style = ProgressBarStyle.Marquee; 并且不会将它放在 Worker_DoWork 上，因为它在那里但在某些方面什么都不做。
我建议的代码是这样的，BackgroundWorker 正在做它的工作，搜索文件而不阻塞 UI 线程 AKA 在执行可能需要很长时间的任务时不阻塞程序
单击我们可以使其可见，然后在工作完成后 Worker_RunWorkerCompleted 不可见。
我确实在此处更改了 Worker_DoWork，删除了 progressBar1 上的更新，因为它只是为了外观而不做任何其他事情并让它完成它的工作，这个过程可能需要很长时间，这就是他们的目的
public partial class FormPesquisaFotos : Form
{
// We create the DataTable here so we can create the new inside the Worker_DoWork and use it also on the Worker_RunWorkerCompleted
DataTable tableWithPhotos;
private void button1_Click(object sender, EventArgs e)
{
// Make the progressBar1 to look like its allways loading something
progressBar1.Style = ProgressBarStyle.Marquee;
// Make it here visible
progressBar1.Visible = true;
var worker = new BackgroundWorker();
// Event that runs on background
worker.DoWork += this.Worker_DoWork;
// Event that will run after the background event as finnished
worker.RunWorkerCompleted += this.Worker_RunWorkerCompleted;
worker.RunWorkerAsync();
}
// The reason for having this here was to work with the progress bar and to search for the photos and it will not block the UI Thread
// My advice is to have them here and pass them to the next form with a constructor
private void Worker_DoWork(object sender, DoWorkEventArgs e)
{
// We must create a list for all the files that the search it will find
List<string> filesList = new List<string>();
// Create the new DataTable to be used
tableWithPhotos = new DataTable();
tableWithPhotos.Columns.Add("Nome e formato do ficheiro (duplo clique para visualizar a imagem)");
tableWithPhotos.Columns.Add("Caminho ( pode ser copiado Ctrl+C )");
// What folders that we want to search for the files
var diretorios = new List<string>() { @"\Server\folder1\folder2" };
// What extensions that we want to search
var extensoes = new List<string>() {"*.jpg","*.bmp","*.png","*.tiff","*.gif"};
// This 2 foreach are to search for the files with the extension that is on the extensoes and on all directories that are on diretorios
// In for foreach we go through all the extensions that we want to search
foreach (string entryExtensions in extensoes)
{
// Now we must go through all the directories to search for the extension that is on the entryExtensions
foreach (string entryDirectory in diretorios)
{
// SearchOption.AllDirectories search the directory and sub directorys if necessary
// SearchOption.TopDirectoryOnly search only the directory
filesList.AddRange(Directory.GetFiles(entryDirectory, entryExtensions, SearchOption.AllDirectories));
}
}
// And now here we will add all the files that it has found into the DataTable
foreach (string entryFiles in filesList)
{
DataRow row = tableWithPhotos.NewRow();
row[0] = Path.GetFileName(entryFiles);
row[1] = entryFiles;
tableWithPhotos.Rows.Add(row);
}
}
private void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
// With the new constructor on the FormResultadosFotos, we pass the table like this so the form can receive it
progressBar1.Visable = false;
var NovoForm = new FormResultadosFotos(tableWithPhotos);
NovoForm.Show();
}
}
在 FormResultadosFotos 上，我们创建了一个新的构造函数，它将接收 DataTable 并无需在此处搜索文件，因为它们都已在 table
上准备就绪
public partial class FormResultadosFotos : Form
{
// This is the constructor that we have added to the FormResultadosFotos so it can receive the DataTable that was created on the previous form
Public FormResultadosFotos(DataTable table)
{
InitializeComponent();
dataGridView1.DataSource = table;
dataGridView1.Columns[1].Visible = true;
// What can be done here to not block the UI thread if is being blocked while populating the dataGridView1, is to create another BackgroundWorker here and populate the dataGridView1 there
}
private void dataGridView1_DoubleClick(object sender, EventArgs e)
{
var myForm = new FormPictureBox();
string imageName = dataGridView1.CurrentRow.Cells[1].Value.ToString();
var img = Image.FromFile(imageName);
myForm.pictureBox1.Image = img;
myForm.ShowDialog();
}
}
要让 progressBar1 从 1 变为 100，您需要在搜索之前知道有多少文件等等，因为我们不知道，让它从1 到 100 是不可能的，至少据我所知，如果可能的话，请为此创建一个答案，因为我想知道如何
像这样（你必须在 Class FormResultadosFotos 中有其他方法，至少是基本构造函数）它会做你想做的，搜索可能需要很长时间的文件就完成了在一个新线程 AKA BackgroundWorker 上，如果列表 diretorios 上的目录中有任何 "*.jpg","*.bmp","*.png","*.tiff","*.gif" 文件，它将把它们放在列表 filesList 上，依此类推 foreach可以添加到DataTable
编辑：
即使我自己是葡萄牙语，也只是一点建议，在这里提问时，尽量不要用葡萄牙语写东西，使用英语，比如注释和变量，这样更容易阅读你的代码。
编辑 2：
使用我提供给您的代码，它可以正常工作，正如您从图片中看到的那样：
这是程序 download link
的 link
从我分享给你的信息可以看出，应该可以解决你遇到的问题，请查看我用我提供给你的例子制作的程序的源代码
我有一个带有搜索按钮和进度条的表单，用于在网络目录中查找照片。 它 returns 一个错误：
System.Reflection.TargetInvocationException
HResult=0x80131604
Message=O destino de uma invocação accionou uma excepção.
Source=mscorlib
StackTrace:
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at _myprogram.Program.Main() in C:\Users\folder\Desktop\folder\folder\V10\folder\Program.cs:line 19
Inner Exception 1:
ArgumentOutOfRangeException: O índice estava fora do intervalo. Tem de ser não negativo e inferior ao tamanho da colecção.
Nome do parâmetro: índex
代码如下：
public partial class FormProcuraFotos : Form
{
public FormProcuraFotos()
{
InitializeComponent();
}
// We create the DataTable here so we can create the new inside the Worker_DoWork and use it also on the Worker_RunWorkerCompleted
DataTable tableWithPhotos;
private void button1_Click(object sender, EventArgs e)
{
// Make the progressBar1 to look like its allways loading something
progressBar1.Style = ProgressBarStyle.Marquee;
// Make it here visible
progressBar1.Visible = true;
var worker = new BackgroundWorker();
// Event that runs on background
worker.DoWork += this.Worker_DoWork;
// Event that will run after the background event as finnished
worker.RunWorkerCompleted += this.Worker_RunWorkerCompleted;
worker.RunWorkerAsync();
}
// The reason for having this here was to work with the progress bar and to search for the photos and it will not block the UI Thread
// My advice is to have them here and pass them to the next form with a constructor
private void Worker_DoWork(object sender, DoWorkEventArgs e)
{
// We must create a list for all the files that the search it will find
List<string> filesList = new List<string>();
// Create the new DataTable to be used
tableWithPhotos = new DataTable();
tableWithPhotos.Columns.Add("Nome e formato do ficheiro (duplo clique para visualizar a imagem)");
tableWithPhotos.Columns.Add("Caminho ( pode ser copiado Ctrl+C )");
// What folders that we want to search for the files
var diretorios = new List<string>() { @"C:\Users\folder\Pictures" };
// What extensions that we want to search
var extensoes = new List<string>() { ".jpg", ".bmp", ".png", ".tiff", ".gif" };
// This 2 foreach are to search for the files with the extension that is on the extensoes and on all directories that are on diretorios
// In for foreach we go through all the extensions that we want to search
foreach (string entryExtensions in extensoes)
{
// Now we must go through all the directories to search for the extension that is on the entryExtensions
foreach (string entryDirectory in diretorios)
{
// SearchOption.AllDirectories search the directory and sub directorys if necessary
// SearchOption.TopDirectoryOnly search only the directory
filesList.AddRange(Directory.GetFiles(entryDirectory, entryExtensions, SearchOption.AllDirectories));
}
}
// And now here we will add all the files that it has found into the DataTable
foreach (string entryFiles in filesList)
{
DataRow row = tableWithPhotos.NewRow();
row[0] = Path.GetFileName(entryFiles);
row[1] = entryFiles;
tableWithPhotos.Rows.Add(row);
}
}
private void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
// With the new constructor on the FormResultadosFotos, we pass the table like this so the form can receive it
progressBar1.Visible = false;
var NovoForm = new FormResultadosFotos(tableWithPhotos);
NovoForm.Show();
}
}
} 我有另一种形式在 datagridview 上显示这些结果（这个 datagridview 有一个图片框，如果用户双击则显示照片） 这是代码：
public partial class FormResultadosFotos : Form
{
// This is the constructor that we have added to the FormResultadosFotos so it can receive the DataTable that was created on the previous form
public FormResultadosFotos(DataTable table)
{
InitializeComponent();
dataGridView1.DataSource = table;
dataGridView1.Columns[1].Visible = true;
// What can be done here to not block the UI thread if is being blocked while populating the dataGridView1, is to create another BackgroundWorker here and populate the dataGridView1 there
}
}
}
是否可以帮助我并指出问题所在？谢谢。
我会将 ProgressBar 更改为像这样继续 progressBar1.Style = ProgressBarStyle.Marquee; 并且不会将它放在 Worker_DoWork 上，因为它在那里但在某些方面什么都不做。
我建议的代码是这样的，BackgroundWorker 正在做它的工作，搜索文件而不阻塞 UI 线程 AKA 在执行可能需要很长时间的任务时不阻塞程序
单击我们可以使其可见，然后在工作完成后 Worker_RunWorkerCompleted 不可见。
我确实在此处更改了 Worker_DoWork，删除了 progressBar1 上的更新，因为它只是为了外观而不做任何其他事情并让它完成它的工作，这个过程可能需要很长时间，这就是他们的目的
public partial class FormPesquisaFotos : Form
{
// We create the DataTable here so we can create the new inside the Worker_DoWork and use it also on the Worker_RunWorkerCompleted
DataTable tableWithPhotos;
private void button1_Click(object sender, EventArgs e)
{
// Make the progressBar1 to look like its allways loading something
progressBar1.Style = ProgressBarStyle.Marquee;
// Make it here visible
progressBar1.Visible = true;
var worker = new BackgroundWorker();
// Event that runs on background
worker.DoWork += this.Worker_DoWork;
// Event that will run after the background event as finnished
worker.RunWorkerCompleted += this.Worker_RunWorkerCompleted;
worker.RunWorkerAsync();
}
// The reason for having this here was to work with the progress bar and to search for the photos and it will not block the UI Thread
// My advice is to have them here and pass them to the next form with a constructor
private void Worker_DoWork(object sender, DoWorkEventArgs e)
{
// We must create a list for all the files that the search it will find
List<string> filesList = new List<string>();
// Create the new DataTable to be used
tableWithPhotos = new DataTable();
tableWithPhotos.Columns.Add("Nome e formato do ficheiro (duplo clique para visualizar a imagem)");
tableWithPhotos.Columns.Add("Caminho ( pode ser copiado Ctrl+C )");
// What folders that we want to search for the files
var diretorios = new List<string>() { @"\Server\folder1\folder2" };
// What extensions that we want to search
var extensoes = new List<string>() {"*.jpg","*.bmp","*.png","*.tiff","*.gif"};
// This 2 foreach are to search for the files with the extension that is on the extensoes and on all directories that are on diretorios
// In for foreach we go through all the extensions that we want to search
foreach (string entryExtensions in extensoes)
{
// Now we must go through all the directories to search for the extension that is on the entryExtensions
foreach (string entryDirectory in diretorios)
{
// SearchOption.AllDirectories search the directory and sub directorys if necessary
// SearchOption.TopDirectoryOnly search only the directory
filesList.AddRange(Directory.GetFiles(entryDirectory, entryExtensions, SearchOption.AllDirectories));
}
}
// And now here we will add all the files that it has found into the DataTable
foreach (string entryFiles in filesList)
{
DataRow row = tableWithPhotos.NewRow();
row[0] = Path.GetFileName(entryFiles);
row[1] = entryFiles;
tableWithPhotos.Rows.Add(row);
}
}
private void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
// With the new constructor on the FormResultadosFotos, we pass the table like this so the form can receive it
progressBar1.Visable = false;
var NovoForm = new FormResultadosFotos(tableWithPhotos);
NovoForm.Show();
}
}
在 FormResultadosFotos 上，我们创建了一个新的构造函数，它将接收 DataTable 并无需在此处搜索文件，因为它们都已在 table
上准备就绪public partial class FormResultadosFotos : Form
{
// This is the constructor that we have added to the FormResultadosFotos so it can receive the DataTable that was created on the previous form
Public FormResultadosFotos(DataTable table)
{
InitializeComponent();
dataGridView1.DataSource = table;
dataGridView1.Columns[1].Visible = true;
// What can be done here to not block the UI thread if is being blocked while populating the dataGridView1, is to create another BackgroundWorker here and populate the dataGridView1 there
}
private void dataGridView1_DoubleClick(object sender, EventArgs e)
{
var myForm = new FormPictureBox();
string imageName = dataGridView1.CurrentRow.Cells[1].Value.ToString();
var img = Image.FromFile(imageName);
myForm.pictureBox1.Image = img;
myForm.ShowDialog();
}
}
要让 progressBar1 从 1 变为 100，您需要在搜索之前知道有多少文件等等，因为我们不知道，让它从1 到 100 是不可能的，至少据我所知，如果可能的话，请为此创建一个答案，因为我想知道如何
像这样（你必须在 Class FormResultadosFotos 中有其他方法，至少是基本构造函数）它会做你想做的，搜索可能需要很长时间的文件就完成了在一个新线程 AKA BackgroundWorker 上，如果列表 diretorios 上的目录中有任何 "*.jpg","*.bmp","*.png","*.tiff","*.gif" 文件，它将把它们放在列表 filesList 上，依此类推 foreach可以添加到DataTable
编辑：
即使我自己是葡萄牙语，也只是一点建议，在这里提问时，尽量不要用葡萄牙语写东西，使用英语，比如注释和变量，这样更容易阅读你的代码。
编辑 2：
使用我提供给您的代码，它可以正常工作，正如您从图片中看到的那样：
这是程序 download link
的 link从我分享给你的信息可以看出，应该可以解决你遇到的问题，请查看我用我提供给你的例子制作的程序的源代码