Meistro Posts - Answer Overflow

Meistro

•Created by Meistro on 4/24/2023 in #help

❔ Random take a File from a Folder

Hello Dear CSharp Programmers I have a Question, lets say I have a folder with 1_000 Files. From this folder I would like to randomly pick 1_00. But every file should be taken only once. How would this method look like ? I tryed it by myself but it always take one file more then once. my Code:

 static public int RandomNumber;
 static public int randomIndex;
 static Random random = new Random(DateTime.Now.Millisecond);;

        public string GetRadomFileFromGivenFolderPath()
        {
            if (FolderPath_RandomFiles.Text != " ")
            {
                // Get an array of all file paths in the specified folder
                string[] files = Directory.GetFiles(FolderPath_RandomFiles.Text);

                // If no files are found, return null
                if (files.Length == 0)
                {
                    UpdateRichTextBox("No Files found!");
                    return "null";
                }

                // Generate a random number between 0 and the number of files minus 1
                do
                {
                    // Generate a random number between 0 and the number of files minus 1
                    randomIndex = random.Next(0, files.Length - 1);

                } while (RandomNumber == randomIndex);

                RandomNumber = randomIndex;
                // Return the file path at the random index
                return RandomFilePath = files[randomIndex];
            }
            else
            {
                UpdateRichTextBox("Folder path for \"random Files Path\" not found!");
                return "null";
            }
        }

 static public int RandomNumber;
 static public int randomIndex;
 static Random random = new Random(DateTime.Now.Millisecond);;

        public string GetRadomFileFromGivenFolderPath()
        {
            if (FolderPath_RandomFiles.Text != " ")
            {
                // Get an array of all file paths in the specified folder
                string[] files = Directory.GetFiles(FolderPath_RandomFiles.Text);

                // If no files are found, return null
                if (files.Length == 0)
                {
                    UpdateRichTextBox("No Files found!");
                    return "null";
                }

                // Generate a random number between 0 and the number of files minus 1
                do
                {
                    // Generate a random number between 0 and the number of files minus 1
                    randomIndex = random.Next(0, files.Length - 1);

                } while (RandomNumber == randomIndex);

                RandomNumber = randomIndex;
                // Return the file path at the random index
                return RandomFilePath = files[randomIndex];
            }
            else
            {
                UpdateRichTextBox("Folder path for \"random Files Path\" not found!");
                return "null";
            }
        }

I wanted to also store all ever picked Files and always check if the newly picked random file has already used once or not but I couldnt manage to code it. thank you for every help

19 replies

CC#

•Created by Meistro on 4/24/2023 in #help

Random pick a file from a given Folder

 static public int RandomNumber;
 static public int randomIndex;
 static Random random = new Random(DateTime.Now.Millisecond);;

        public string GetRadomFileFromGivenFolderPath()
        {
            if (FolderPath_RandomFiles.Text != " ")
            {
                // Get an array of all file paths in the specified folder
                string[] files = Directory.GetFiles(FolderPath_RandomFiles.Text);

                // If no files are found, return null
                if (files.Length == 0)
                {
                    UpdateRichTextBox("No Files found!");
                    return "null";
                }

                // Generate a random number between 0 and the number of files minus 1
                do
                {
                    // Generate a random number between 0 and the number of files minus 1
                    randomIndex = random.Next(0, files.Length - 1);

                } while (RandomNumber == randomIndex);

                RandomNumber = randomIndex;
                // Return the file path at the random index
                return RandomFilePath = files[randomIndex];
            }
            else
            {
                UpdateRichTextBox("Folder path for \"random Files Path\" not found!");
                return "null";
            }
        }

 static public int RandomNumber;
 static public int randomIndex;
 static Random random = new Random(DateTime.Now.Millisecond);;

        public string GetRadomFileFromGivenFolderPath()
        {
            if (FolderPath_RandomFiles.Text != " ")
            {
                // Get an array of all file paths in the specified folder
                string[] files = Directory.GetFiles(FolderPath_RandomFiles.Text);

                // If no files are found, return null
                if (files.Length == 0)
                {
                    UpdateRichTextBox("No Files found!");
                    return "null";
                }

                // Generate a random number between 0 and the number of files minus 1
                do
                {
                    // Generate a random number between 0 and the number of files minus 1
                    randomIndex = random.Next(0, files.Length - 1);

                } while (RandomNumber == randomIndex);

                RandomNumber = randomIndex;
                // Return the file path at the random index
                return RandomFilePath = files[randomIndex];
            }
            else
            {
                UpdateRichTextBox("Folder path for \"random Files Path\" not found!");
                return "null";
            }
        }

I wanted to also store all ever picked Files and always check if the newly picked random file has already used once or not but I couldnt manage to code it. thank you for every help

1 replies

CC#

•Created by Meistro on 4/18/2023 in #help

❔ multithreading with Tasks

I have a question about C# multithreading or async methods. I'm currently trying to upload multiple files to a server via an API (with login data, etc.). My problem is that while waiting for all the tasks to complete, I want to query how many tasks have already finished, as long as the tasks are not yet completed. Specifically, I am uploading 30k files. Each file is started as a task. While the tasks are running, a loop should run during the await (await Task.WhenAll(uploadTasks);) to check how many tasks have already completed, and every 10k files, there should be a message like "Hey, I have uploaded 10k files and it's still running."

                //<--- there is a code for the task above that runs all task

                await Task.WhenAll(uploadTasks);

                //decides how often should the system give a feedback every 10000 Files
                runnerctr = 0;

                //10.000 steps
                int runner = 0;
                
                // Loop that checks out hwo is process doing
                while (runner < int.Parse(File_Upload_Count_Simu.Text))
                {
                    //wait for some time before updating
                    await Task.Delay(TimeSpan.FromSeconds(5));

                    // loop through all tasks and update the counter for all done uploads(tasks)
                    foreach (var task in uploadTasks)
                    {
                        if (task.IsCompleted)
                        {
                            runner++;
                        }
                    }
                    // get progress every 10000 tasks which are done
                    if (runner >= runnerctr + 10000)
                    {
                        runnerctr += 10000;
                        UpdateRichTextBox("do something");
                    }
                }

                //<--- there is a code for the task above that runs all task

                await Task.WhenAll(uploadTasks);

                //decides how often should the system give a feedback every 10000 Files
                runnerctr = 0;

                //10.000 steps
                int runner = 0;
                
                // Loop that checks out hwo is process doing
                while (runner < int.Parse(File_Upload_Count_Simu.Text))
                {
                    //wait for some time before updating
                    await Task.Delay(TimeSpan.FromSeconds(5));

                    // loop through all tasks and update the counter for all done uploads(tasks)
                    foreach (var task in uploadTasks)
                    {
                        if (task.IsCompleted)
                        {
                            runner++;
                        }
                    }
                    // get progress every 10000 tasks which are done
                    if (runner >= runnerctr + 10000)
                    {
                        runnerctr += 10000;
                        UpdateRichTextBox("do something");
                    }
                }

it is working by the way ...but I am not sure whether it is realy counting while awating or not.

127 replies

CC#

•Created by Meistro on 3/21/2023 in #help

Newtonsoft.Json.JsonReaderException: "Unexpected character encountered while parsing value: <. Path

Hei all, I am coding a REST API HTTP POST REQUEST, but I always get an error as soon as I start Building the Project. Might it be the way how my JSON is written ? or maybe something else ? the code:

static private void RunAsyncPost(string username, string password)
{
            string url = "http://someIP/rest";

            // Create the JSON request body
            var requestBody = new
            {
                info = new
                {
                    name = "C#testfile.js",
                    type = 282,
                    isDir = false,
                    desc = "",
                    @lock = "",
                    ownerName = "Some Service",
                    access = "WDDRWDE-PIDDS",
                    parentId = 234253
                },
                acl = new[]
                {
                new
                {
                    member = "Administrator",
                    id = 0,
                    type = "USER",
                    access = "RWWEDSGEERLP"
                }
            },
                keywording = new
                {
                    maskNameOriginal = "Incoming Invoice",
                    fields = new
                    {
                        VENDOR_NAME = "Test_Vendor1"
                    }
                }
            };

            // Serialize the JSON request body
            string jsonRequestBody = JsonConvert.SerializeObject(requestBody);

            // Create the HTTP client and request message
            using (var httpClient = new HttpClient())
            using (var requestMessage = new HttpRequestMessage(HttpMethod.Post, url))
            {
                // Set the authorization header
                string authHeader = "Basic " + Convert.ToBase64String(System.Text.Encoding.ASCII.GetBytes($"{username}:{password}"));
                requestMessage.Headers.Authorization = new AuthenticationHeaderValue("Authorization", authHeader);

                // Set the content type and request body
                requestMessage.Content = new StringContent(jsonRequestBody, System.Text.Encoding.UTF8, "application/json");

                // Send the HTTP request and get the response
                var response = httpClient.SendAsync(requestMessage).Result;

                // Check the response status code
                if (response.IsSuccessStatusCode)
                {
                    // Deserialize the response body
                    //var responseBody = JsonConvert.DeserializeObject(response.Content.ReadAsStringAsync().Result);
                    var responseBody = JsonConvert.DeserializeObject<string>(response.Content.ReadAsStringAsync().Result);
                // Do something with the response
                ResponseStream = responseBody.ToString(); // output normaly in CMD but here I am using a textbox of windows Forms
                }
                else
                {
                ResponseStream = $"HTTP error {response.StatusCode}"; // output normaly in CMD but here I am using a textbox of windows Forms
                }
            }

static private void RunAsyncPost(string username, string password)
{
            string url = "http://someIP/rest";

            // Create the JSON request body
            var requestBody = new
            {
                info = new
                {
                    name = "C#testfile.js",
                    type = 282,
                    isDir = false,
                    desc = "",
                    @lock = "",
                    ownerName = "Some Service",
                    access = "WDDRWDE-PIDDS",
                    parentId = 234253
                },
                acl = new[]
                {
                new
                {
                    member = "Administrator",
                    id = 0,
                    type = "USER",
                    access = "RWWEDSGEERLP"
                }
            },
                keywording = new
                {
                    maskNameOriginal = "Incoming Invoice",
                    fields = new
                    {
                        VENDOR_NAME = "Test_Vendor1"
                    }
                }
            };

            // Serialize the JSON request body
            string jsonRequestBody = JsonConvert.SerializeObject(requestBody);

            // Create the HTTP client and request message
            using (var httpClient = new HttpClient())
            using (var requestMessage = new HttpRequestMessage(HttpMethod.Post, url))
            {
                // Set the authorization header
                string authHeader = "Basic " + Convert.ToBase64String(System.Text.Encoding.ASCII.GetBytes($"{username}:{password}"));
                requestMessage.Headers.Authorization = new AuthenticationHeaderValue("Authorization", authHeader);

                // Set the content type and request body
                requestMessage.Content = new StringContent(jsonRequestBody, System.Text.Encoding.UTF8, "application/json");

                // Send the HTTP request and get the response
                var response = httpClient.SendAsync(requestMessage).Result;

                // Check the response status code
                if (response.IsSuccessStatusCode)
                {
                    // Deserialize the response body
                    //var responseBody = JsonConvert.DeserializeObject(response.Content.ReadAsStringAsync().Result);
                    var responseBody = JsonConvert.DeserializeObject<string>(response.Content.ReadAsStringAsync().Result);
                // Do something with the response
                ResponseStream = responseBody.ToString(); // output normaly in CMD but here I am using a textbox of windows Forms
                }
                else
                {
                ResponseStream = $"HTTP error {response.StatusCode}"; // output normaly in CMD but here I am using a textbox of windows Forms
                }
            }

Thanks in advance for any help 🙂

24 replies

CC#

•Created by Meistro on 10/25/2022 in #help

System.UnauthorizedAccessException [Answered]

Hei I need help with this line

 foreach (string valid_path in Directory.EnumerateDirectories(dir, validFolderName, SearchOption.AllDirectories))

 foreach (string valid_path in Directory.EnumerateDirectories(dir, validFolderName, SearchOption.AllDirectories))

I want to search for a specific Folder in my Drive "C:\" But it always give me access denie for C:$Recycle.Bin. I want to skip it but it doesnt work even with try cath. Thanks for any help

15 replies

CC#

•Created by Meistro on 10/17/2022 in #help

denied accessing path string[] list1 = Directory.GetFiles(C_Drive, *.exe, SearchOption.AllDirectorie

Hei all, I am not able to iterate through my drive ... is it a security problem ? I already opened VS as Admin ERROR Message:

Unhandled exception. System.UnauthorizedAccessException: Access to the path 'C:\Documents and Settings' is denied.
   at System.IO.Enumeration.FileSystemEnumerator`1.CreateRelativeDirectoryHandle(ReadOnlySpan`1 relativePath, String fullPath)
   at System.IO.Enumeration.FileSystemEnumerator`1.MoveNext()
   at System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
   at System.Collections.Generic.EnumerableHelpers.ToArray[T](IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)

Unhandled exception. System.UnauthorizedAccessException: Access to the path 'C:\Documents and Settings' is denied.
   at System.IO.Enumeration.FileSystemEnumerator`1.CreateRelativeDirectoryHandle(ReadOnlySpan`1 relativePath, String fullPath)
   at System.IO.Enumeration.FileSystemEnumerator`1.MoveNext()
   at System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
   at System.Collections.Generic.EnumerableHelpers.ToArray[T](IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)

Thanks in Advance for any Help 🙂

7 replies

CC#

•Created by Meistro on 10/11/2022 in #help

Project wont run

Executable in debug won´t run when moving project folder to another location

7 replies

CC#

•Created by Meistro on 10/10/2022 in #help

Hei all, I am new to this Server and I realy need help on specific Problem [Answered]

I am trying to move a .csv File from a Folder to another and it is actualy working but when I open the transfered File and compare it with the original one, the new File seem to be completly different. It is broken. There are new Characters in the new file which are not existing in the Origin one. Thanks in advance

102 replies

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