我正在使用C＃练习OCR程序，我不是一个编码员，所以我想尽办法。
1-我 OCR 一些pdf文件。
2-我看到了 OCR 的输出。
3-我使用UI按钮进行浏览，然后单击“转换”。
4-我在UI上有一个进度条，但是它没有视觉上的升级，而当我登录progressBar.Value时，我看到它的编号正在更新。
所以我四处搜寻，发现问题是我想停止线程并为Ui创建一个新的线程以进行视觉更新，但是我真的不明白，甚至不知道该怎么做。
有人可以帮我吗？像婴儿的脚步。
我也知道我已经复制并粘贴了很多代码供您查看。
情况如下：
1-类fmMain：Form具有progressBarIncrementation函数，负责从processFunctions类中的函数获取增量值。
2- progressBarIncrementation函数的progressBar.Value有待更新，我看到其值已更新。
3-但是在视觉上没有任何更新。我尝试了一些线程代码，但是我不明白。.....
class processFunctions
{
Thread newThread = Thread.CurrentThread;
private string invoiceNameIndex = "";
private string invoiceIBANIndex = "";
private string invoiceNumberIndex = "";
private string invoiceDateIndex = "";
private string invoiceSubtotalIndex = "";
private string invoiceVATIndex = "";
private string invoiceTotalIndex = "";
private string[] filePath;
private string[] fileNamePDF;
private int totalNumberOfFiles;
private string InformationNeeded(string wholeRead, string ix)
{
string[] lines = wholeRead.Split(new[] { "\r\n", "\r", "\n", " " }, StringSplitOptions.None);
if(ix.Contains(","))
{
string[] variableIndex = ix.Split(',');
string name = "";
for(int i =0; i < variableIndex.Length; i++)
{
name += lines[Convert.ToInt32(variableIndex[i])];
}
return name;
}
return lines[Convert.ToInt32(ix)];
}
public void ocrFunction(string filePathOnly)
{
var Ocr = new AutoOcr();
var Results = Ocr.ReadPdf(filePathOnly);
var Barcodes = Results.Barcodes;
var Text = Results.Text;
string[] numbers = { invoiceNameIndex, invoiceIBANIndex, invoiceNumberIndex,
invoiceDateIndex, invoiceSubtotalIndex, invoiceVATIndex, invoiceTotalIndex};
string[] results = new string[numbers.Count()];
for (int i = 0; i < numbers.Length; i++)
{
results[i] = InformationNeeded(Text, numbers[i]);
Console.WriteLine(results[i]);
}
Results = null;
Ocr = null;
Barcodes = null;
Text = null;
}
public int browseFile()
{
Thread.CurrentThread.SetApartmentState(ApartmentState.STA);
OpenFileDialog ofd = new OpenFileDialog();
int numberOfFilesToBeProcessed = 0;
ofd.Filter = "PDF|*.pdf";
ofd.Multiselect = true;
string[] name = new string[2];
if (ofd.ShowDialog() == DialogResult.OK)
{
numberOfFilesToBeProcessed = ofd.FileNames.Length;
filePath = ofd.FileNames;
fileNamePDF = ofd.SafeFileNames;
}
this.totalNumberOfFiles = ofd.FileNames.Length;
return numberOfFilesToBeProcessed;
}
public void databaseReader()
{
string connectionString;
SqlConnection connection;
connectionString = ConfigurationManager.ConnectionStrings["OCR_App.Properties.Settings.LibraryConnectionString"].ConnectionString;
for (int i = 0; i < fileNamePDF.Length; i++)
{
string fileNameFiltered = fileNamePDF[i].Replace(".pdf", "");
using (connection = new SqlConnection(connectionString))
using (SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM invoicesTable WHERE invoiceRef = '" + fileNameFiltered + "'", connection))
{
DataTable invoicesTable = new DataTable();
adapter.Fill(invoicesTable);
DataRow index = invoicesTable.Rows[0];
invoiceNameIndex = (index[1].ToString());
invoiceIBANIndex = (index[2].ToString());
invoiceNumberIndex = (index[3].ToString());
invoiceDateIndex = (index[4].ToString());
invoiceSubtotalIndex = (index[5].ToString());
invoiceVATIndex = (index[6].ToString());
invoiceTotalIndex = (index[7].ToString());
ocrFunction(filePath[i]);
//newThread.Start();
fmMain formFunctions = new fmMain();
//Thread.Yield();
//Thread thread = new Thread(() => formFunctions.ProgressBarIncrementation(progressBarIncrement()));
formFunctions.ProgressBarIncrementation(progressBarIncrement());
}
}
}
public int progressBarIncrement()
{
int incrementValue = 0;
incrementValue = incrementValue + 100 / totalNumberOfFiles;
//Console.WriteLine(incrementValue);
return incrementValue;
}
///////////////////////////////////////////////////////////////////
public partial class fmMain : Form
{
processFunctions processingMain = new processFunctions();
ProgressBar NewprogressBar = new ProgressBar();
private static int incrementbar = 0;
public fmMain()
{
InitializeComponent();
}
[STAThread]
private void BtnBrowse_Click(object sender, EventArgs e)
//Browse the file needed to scan.
{
int number = processingMain.browseFile();
txtBoxFilePath.Text = number.ToString();
}
public void BtnConvert_Click(object sender, EventArgs e)
{
processingMain.databaseReader();
}
private void fmMain_Load(object sender, EventArgs e)
{
}
private void txtBoxFilePath_TextChanged(object sender, EventArgs e)
{
}
private void NumberOfFilesToBeProcessed_Click(object sender,
EventArgs e)
{
}
public void progressBar_Click(object sender, EventArgs e)
{
progressBar.Maximum = 100;
NewprogressBar.Value = progressBar.Value;
}
public void ProgressBarIncrementation(int incrementValue)
{
//Thread.Yield();
//Thread newThread = Thread.CurrentThread;
incrementbar = incrementbar + incrementValue;
progressBar.Visible = true;
progressBar.Value += incrementbar;
Thread thread = new Thread(() => progressBar.Value += incrementbar);
Console.WriteLine(progressBar.Value);
//progressBar.Value += incrementbar;
}
}
答案 0 :(得分：-1)
如果需要进度条，则可能需要考虑创建一个事件，以帮助向呼叫应用程序报告进度。然后，您需要将功能browserFile标记为异步并执行以下操作：
public async Task<int> browseFileAsync()
{
await Task.Run(new Action(() => {
OpenFileDialog ofd = new OpenFileDialog();
int numberOfFilesToBeProcessed = 0;
ofd.Filter = "PDF|*.pdf";
ofd.Multiselect = true;
string[] name = new string[2];
if (ofd.ShowDialog() == DialogResult.OK)
{
numberOfFilesToBeProcessed = ofd.FileNames.Length;
filePath = ofd.FileNames;
fileNamePDF = ofd.SafeFileNames;
}
this.totalNumberOfFiles = ofd.FileNames.Length;
return numberOfFilesToBeProcessed;
}));
}
然后在调用应用程序中执行：
private async void BtnBrowse_Click(object sender, EventArgs e)
//Browse the file needed to scan.
{
int number = await processMain.browseFileAsync();
txtBoxFilePath.Text = number.ToString();
}
我还将考虑不从您的类中调用文件夹浏览器对话框，因为这会将您的类耦合到特定的实现。相反，我将从GUI浏览文件，然后将所选文件传递给类。