How to read text from file and display in a listbox

Question

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I have some images that i saved in my program along with coordinates that have been marked from the images. The coordinates are saved in a text file with the name of the image. I want to be able to select the image in a listbox and check if there is a text file with the same name as the selected image and then display the coordinate from the text file into another listbox.
Here is the code i have written:

C#

string path = Application.StartupPath;
                   string pathString = System.IO.Path.Combine(path, "output Directory");
                   string myFile = lstImages.SelectedItem.ToString() + ".artery";
                   pathString = System.IO.Path.Combine(pathString, myFile);

                   //Read and dispalay the data from file it it exist
                   if (System.IO.File.Exists(lstImages.SelectedItem.ToString()))
                   {
                       using(StreamReader sr = new StreamReader(myFile))
                       {
                           string line;
                           while((line = sr.ReadLine()) !=null)
                           {
                               lstArtery.Items.Add(line);
                           }
                       }
                   }

This is the code that fetches the image and displays it in the listbox. This code is working fine. But i have not been able to display the content of the text file when the image is selected

C#

//fetch and display the images selected in the list box
                   string filename = System.IO.Path.Combine(parentDir, lstImages.SelectedItem.ToString());
                   //picImageDisplay.Image = System.Drawing.Image.FromFile(filename);
                   //picImageDisplay.Image = (Bitmap).FromFile(filename);
                   Bitmap myImage = new Bitmap(System.Drawing.Image.FromFile(filename));
                   picImageDisplay.Image = myImage;

please i need help to be able to complete my project

Posted 30-Apr-15 5:04am

Member 9599225

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Comments

Kenneth Haugland 30-Apr-15 11:14am

Any chance that you can save it in a XML file instead? Should make it easier to deal with the file reading etc, as all the information will be in one place?

Member 9599225 30-Apr-15 11:19am

@Kenneth Haughland. Thank you for your response I appreciate it. How will I be able to save it to XML file. I am new to c# programming. This is my first project

Kenneth Haugland 30-Apr-15 11:36am

Here is a simple way of storing and loading a class into a XML file format:
https://support.microsoft.com/en-us/kb/316730

Abdul Samad KP 30-Apr-15 11:27am

I think there is a mistake in your code for reading the text file
change
if (System.IO.File.Exists(lstImages.SelectedItem.ToString()))
to
if (System.IO.File.Exists(myFile))

Member 9599225 30-Apr-15 11:34am

@Abdul Samad KP. I appreciate your input. I tried your suggestion but i have not been able to resolve the issue still.

Richard MacCutchan 30-Apr-15 11:42am

It should be:


if (System.IO.File.Exists(pathString))
{
    using(StreamReader sr = new StreamReader(pathString))

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Member 9599225 · Accepted Answer · 2015-04-30T07:44:00

Thank you all for your contribution. I have solved the problem myself. I really appreciate your time and effort.
Here is the solution:

C#

/display the coordinates of the selected file
                    string path = Application.StartupPath;
                    string pathString = System.IO.Path.Combine(path, "output Directory");
                    // string myFile = lstImages.SelectedItem.ToString() + ".artery";
                    string myFile = System.IO.Path.Combine(pathString, lstImages.SelectedItem.ToString() + ".artery" );
                    pathString = System.IO.Path.Combine(pathString, myFile);

                    //Read and dispalay the data from file it it exist
                    if (System.IO.File.Exists(pathString))
                    {
                        using (StreamReader sr = new StreamReader(pathString))
                        {
                            lstArtery.Items.Add("Artery");
                            string line;
                            while ((line = sr.ReadLine()) != null)
                            {
                                lstArtery.Items.Add(line);
                            }
                        }
                    }