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Reading a text file with c# [closed]

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So far this is my code. The problem I am encountering is that the file is not being found.
namespace Assignment_Forms_Aplication
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
//Define Variable
string[] words = new string[10];
// Read the text from the text file, and insert it into the array
StreamReader SR = new StreamReader(#"Library.txt");
//
for (int i = 0; i < 10; i++)
{
words[i] = SR.ReadLine();
}
// Close the text file, so other applications/processes can use it
SR.Close();
}
}
}

Hi Gailen use the following method:
File.ReadAllLines(#"location");
If location is correct then this will work
Assign to variable, for example

C# Global Object [closed]

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I am building a program for my course in which i need global objects as i intend to have the object accessible from many forms and edited also. Before saying just use global variables i cant the specs state for use of OOP.
my latest attempt to fix this is using a public class but this gave a protection error problem
Code:
Form1.cs (forgot to rename and not re doing all the code and design)
public class ObjectsGlobal
{
Bays bay1 = new Bays();
Bays bay10 = new Bays();
}
frmInput.cs
private void btnAdd_Click(object sender, EventArgs e)
{
if ( 1 == Convert.ToInt32(nudBayNum))
{
ObjectsGlobal.bay1.CarMake = txtMake.Text;
}
}
any ideas are welcome at this point

Change it to:
public static class ObjectsGlobal
{
public static Bays bay1 = new Bays();
public static bay10 = new Bays();
}
Also, as recommended in a comment I have now read, take a look at the Singleton Pattern.

Select data from access database using class [closed]

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I tried to retrieve data from access database. I wrote the function inside of a class and i got this error. So please anyone know an answer for this question please let me know how can i fix it. the below function is wrote in a class and i need to know how to display data to listview control by using this function and how to call it form load event. i tried to fix this lots of time and i still didn't get a solution for this.
public List<String> displayRoom()
{
List<String> rooms = new List<String>();
String query = "select * from room";
cmd = new OleDbCommand(query, connect);
reader = cmd.ExecuteReader();
while(reader.Read()){
rooms.Add(reader["buyer_name"].ToString());
rooms.Add(reader["room_type"].ToString());
rooms.Add(reader["date_from"].ToString());
rooms.Add(reader["date_to"].ToString());
}
return rooms;
}

If you can read data properly from database then just in the form load or constructor of the form class write following line:
//here dbClass is an instance of your database class
List<String> rooms = dbClass.displayRoom(); //though `get/load rooms()` would be more appropriate
foreach (string s in rooms)
{
ListViewItem lv=new ListViewItem(s);
listView1.Items.Add(lv); //listView1 is the ListView instance in your form
}
EDIT
If your Form has name Form, then either in Form1_Load(object sender, EventArgs e) or in public Form1() constructor (after InitializeComponent is called), you can put the above code.

The ExecuteReader requires an open connection:
connect.Open();
Insert just above
reader = cmd.ExecuteReader();
And close the connection when you are done
}
connect.Close();
return rooms;
See MSDN for more info...

Display an error message when empty file name is given in C# [closed]

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I am using Forms in Visual Studio.I would like to display an error message when save is clicked on the save file dialog without giving the filename. How do I do it?
I've tried the following code but it did not work:
I've tried 2 logics.
1)
if (string.IsNullOrEmpty(saveFileDialog1.FileName))
{
MessageBox.Show("Enter the Filename");
}
2) This is the 2nd Logic
private void saveFileDialog1_FileOk(object sender, CancelEventArgs e)
{
if (saveFileDialog1_FileOk == saveFileDialog1.FileName)
{
MessageBox.Show("Enter the Filename");
}
else
{
string name = saveFileDialog1.FileName;
string testvar = textBox1.Text;
File.WriteAllText(name, testvar);
}
}
I want to display an error message when save button is clicked without entering anything in the File Name.
I hope the question is clear!

SaveDialog doesn't really work like this - it won't return an empty string using the OK button, so you really need to check the DialogResult rather than the text of the string. Perhaps something like:
DialogResult dr = saveFileDialog1.ShowDialog();
if (dr == DialogResult.OK)
{
if (System.IO.File.Exists(saveFileDialog1.FileName))
{
//overwrite existing file here
}
else
{
//save as new file here
}
}
else
{
//dialog did not return from an OK button (e.g. cancel)
}
Also consider reading this answer which handles whether the file already exists in a different way.

How to add values per character in c#? [closed]

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I am new to c# and do not know how to explain this but I wanted to know if it was possible to add a charge for every character that is entered into a text box.
For example if the customer was to enter "HELLO HI" they should be charged £5 with a additional cost of £1 per letter or number this £1 charge should also apply for any spaces entered.
Sorry if I have not explained this properly but this is the best way I can.
Thank you

using System;
using System.Windows.Forms;
namespace WindowsFormsApplication6
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
int amount;
private void textBox1_TextChanged(object sender, EventArgs e)
{
amount = 5;
amount = amount + textBox1.Text.Length;
label1.Text = amount.ToString();
}
}
}

Well, it pretty much looks like this, I guess:
string str = "Happy Birthday";
int price = str.Length + 5;

Find the length of entered string in textbox using TextboxID.text.Length and add your fix charge that 5 , as ALEX explain you.
please see alex's answer.