text file and listbox

Question

3.00/5 (2 votes)

See more:

Everything is working except for my questions; what's the code for:
*A text file of bookmarks will be loaded into the listbox. If the text file does not exist, or an exception occurred, a messagebox will be used to display an error message.
*When the form is closed, the current contents of the listbox will be stored in the bookmarks textfile (called bookmarks.txt). If a file error occurs, display a messagebox specifying the error.

Thank you...

C#

    private void btn_go_Click(object sender, EventArgs e)
    {
        wBrowser.Navigate(tbx_website.Text);
    }

    private void btn_bookmark_Click(object sender, EventArgs e)
    {
        //Add the url to the listbox
        LBlist.Items.Add(tbx_website.Text);

        if (LBlist.Items.Count == 0)
        {
            btn_delete.Enabled = false;
        }
    }

    private void btn_delete_Click(object sender, EventArgs e)
    {
        // The Delete button was clicked
        int i_delete = LBlist.SelectedIndex;

        try
        {
            // Remove the item in the List.
            LBlist.Items.RemoveAt(i_delete);

        }
        catch
        {
        }
    }

    private void listbox_DoubleClick(object sender, EventArgs e)
    {
        wBrowser.Navigate(LBlist.SelectedItem.ToString());
    }

    private void wBrowser_Navigated(object sender, WebBrowserNavigatedEventArgs e)
    {
        tbx_website.Text = wBrowser.Url.ToString();
    }

    private void LBlist_SelectedIndexChanged(object sender, EventArgs e)
    {
        btn_delete.Enabled = (LBlist.Items.Count > 0);

    }

    private void Form1_Load(object sender, EventArgs e)
    {
        btn_delete.Enabled = false;
    }

    private void Form1_FormClosed(object sender, FormClosedEventArgs e)
    {
        StreamWriter sw_file;
        string s_bmfile = LBlist.Items.ToString();
        sw_file = new StreamWriter("bookmarks.txt");
        sw_file.Write(s_bmfile);
        sw_file.Close();
    }
}

Posted 28-Sep-11 13:33pm

Jonathan C101

Add a Solution

Comments

Sergey Alexandrovich Kryukov 28-Sep-11 20:14pm

Not clear what's the problem.
--SA

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

hzawary · Answer 1 · 2011-09-28T14:16:00

C#

private void Form1_Load(object sender, EventArgs e)
{
    LBlist.Items.Clear();

    // test to exists 'bookmarks.txt' in the current path
    if (File.Exists("bookmarks.txt"))
    {
        StreamReader sr = new StreamReader("bookmarks.txt");

        foreach (string item in sr.ReadToEnd().Split(new char[] { ';' }))
            LBlist.Items.Add(item);

        sr.Close();
    }
    else
    {
        MessageBox.Show("No found the file!");
    }
    btn_delete.Enabled = false;
}

private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
    StreamWriter sw_file;
    string s_bmfile = "";

    foreach (object item in LBlist.Items)
        s_bmfile += item.ToString() + ";";

    try
    {
        sw_file = new StreamWriter("bookmarks.txt");
        sw_file.Write(s_bmfile);
        sw_file.Close();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}

Bala Selvanayagam · Answer 2 · 2011-10-01T10:13:00

* Create a new windows applicaiton project & add a new form

* Add controls textBox1,comboBox1,btnAdd (button),brnBrowse,btnRemove,btnRemove

* Add

using System.IO;

*try the following code, you can type in a string in the text box and click btnAdd and see the data is in the combo box, you can close the applicaion and open it the data will be still there -- hope this helps

C#

public partial class Form1 : Form
   {

       public readonly string xsdPath = Path.Combine(Environment.GetFolderPath( Environment.SpecialFolder.ApplicationData), "url.xsd");
       public readonly string xmlPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "url.xml");
       private DataSet ds;

       public Form1()
       {
           InitializeComponent();
       }

       private void LoadDataset(){

           try
           {
               if (File.Exists(xsdPath))
               {
                   ds = new DataSet();
                   ds.ReadXmlSchema(xsdPath);
               }
               else
                   CreateSchema();


               if (File.Exists(xmlPath))
                   ds.ReadXml(xmlPath, XmlReadMode.IgnoreSchema);

           }
           catch (Exception ex) { throw ex; }
       }

       private void CreateSchema()
       {
           try{

               ds = new DataSet("dUrl");
               var tUrl = ds.Tables.Add();
               tUrl.Columns.Add("Url",typeof(string));

           }
           catch (Exception ex) { throw ex; }
       }

       private void Form1_Load(object sender, EventArgs e)
       {
           try
           {
               LoadDataset();
               RefreshData();
           }
           catch (Exception ex) { MessageBox.Show(ex.Message); }
       }

       private void RefreshData()
       {
           try
           {
               comboBox1.DataSource = ds.Tables[0];
               comboBox1.DisplayMember = "Url";
           }
           catch (Exception ex) { throw ex; }
       }

       private void Form1_FormClosing(object sender, FormClosingEventArgs e)
       {
           ds.WriteXml(xmlPath, XmlWriteMode.DiffGram);
       }

       private void btnAdd_Click_1(object sender, EventArgs e)
       {
           try
           {
               if (textBox1.Text.Trim().Length != 0)
               {
                   ds.Tables[0].Rows.Add(textBox1.Text);
               }
               RefreshData();
               textBox1.Text = "";
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message);
           }
       }

       private void btnRemove_Click(object sender, EventArgs e)
       {
           ds.Tables[0].Rows[comboBox1.SelectedIndex].Delete();
       }
   }

text file and listbox

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0