Write/Read A Text File - C#

[Atran]

Hello:
In this article: You will learn to Write or Read A Text File.

Let's Begin:
First Create a new project (ConsoleApp or WinApp).
And Make sure your program uses these namespaces:

using System;
using System.IO;
using System.Diagnostics;
 

Now, we will begin writing text to a file:
1)- Create a new stream-writer and open the file:

TextWriter tw = new StreamWriter(@"C:\Hello.txt");
 

2)- Write text to the file:

tw.WriteLine("Hello");
 

3)- Close the file.

tw.Close();
 

4)- Launch the file:

Process.Start(@"C:\Hello.txt");
 

Here is all the code:

//Creating a new stream-writer and opening the file.
TextWriter tsw = new StreamWriter(@"C:\Hello.txt");
 
//Writing text to the file.
tsw.WriteLine("Hello");
 
//Close the file.
tsw.Close();
 
//Launch the file.
Process.Start(@"C:\Hello.txt");
 
Console.WriteLine("You're done, press any key to exit...");
Console.ReadKey();
 

Now, we will begin reading text from a file:
1)- Creating a new stream-reader and opening the file:

TextReader trs = new StreamReader(@"C:\Hello.txt");
 

2)- Reading text of the file:

//Reading all the text of the file.
Console.WriteLine(trs.ReadToEnd());
 
//Or Can Reading a line of the text file.
//Console.WriteLine(trs.ReadLine());
 

3)- Close the file:

trs.Close();
 

Here is all the code:

//Creating a new stream-reader and opening the file.
TextReader trs = new StreamReader(@"C:\Hello.txt");
 
//Reading all the text of the file.
Console.WriteLine(trs.ReadToEnd());
 
//Or Can Reading a line of the text file.
//Console.WriteLine(trs.ReadLine());
 
//Close the file.
trs.Close();
 
Console.WriteLine("Press any key to exit...");
Console.ReadKey();
 

Hope this helped you.

[Rii]

I think it 'll hlp me in project...
Thanks

[prabur]

hi
i need like this hw can i read and write the data into and from .mdb files ie MS ACCESS files.... using C#.. i need that if i enterd a text in a textbox it wil go and store into a .mdb file columns.. and hw can i retrive it back...

[lissi]

// remember that you name your class GetDataFromMDB and store it under this filename
using System;
using System.IO;
using System.Data;
using System.Data.OleDb;
 
namespace OLE_DataGet  // Use your project-namespace here
{
    public class GetDataFromMDB
    {
        private DataTable mDataTable = new DataTable();
 
        #region constructor 
        /// <summary>
        /// The constructor itself
        /// </summary>
        public GetDataFromMDB
        {
            // Anything you will do here, do it.
        }
        #endregion
 
 
        #region MS Access (MDB) access
        /// <summary>
        /// Initialize and read a MDB (MS-Access-File)[here "MDB_FileName.MDB"] and 
                /// store 3 field [here TableItem1,TableItem2,TableItem3] out of the 
                /// database into a DataTable (mDataTable)
        /// </summary>
        /// <param name="pathToMDBfile">combined path and filename to the DataBaseFile</param>
        /// <returns>true if success</returns>
        private bool ReadDataBaseDBF(string pfad)
        {
            bool done = false;
            string source = @"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + pathToMDBfile;
            // select Table(MDB_FileName) und FieldNames(TableItem1,TableItem2,TableItem3)
                        // to be read.
                        // this is the SQL select message for the Jet-Engine to be used here
            string select = "SELECT TableItem1, " + 
                                               "TableItem2, " +
                               "TableItem3 " +
                           "FROM MDB_FileName";
            try
            {
                OleDbConnection conn = new OleDbConnection(source);
                conn.Open();
                OleDbCommand cmd = new OleDbCommand(select, conn);
                OleDbDataReader reader = cmd.ExecuteReader();
                // read TableItems to DataTable
                while(reader.Read())
                {
                    this.mDataTable.Add(reader.GetString(0), 
                                                            reader.GetString(1), 
                                                            reader.GetString(2));
                }
                reader.Close();
                conn.Close();
                done = true;
            }
            catch (Exception e)
            {
                // Whatever you will do with exception-handling, do it here
            }
            return done;
        }
        #endregion
 
                #region properties
 
        /// <summary>
        /// get your Datatable
        /// </summary>                
        /// <returns>the DataTable or null</returns>
                public DataTable MDB_DataTable
                {
                   get
                   {return mDataTable;}
                }
                #endregion
    }
}
 

[Charles Cain]

How can i ensure that i have received a file completely from an external source?Suppose i am receiving a file from an external source and i try to read the file before i have recieved the entire file.How can i ensure that the file has been received completely?

[misbahiqbal]

i need help regarding writting txt file data to access database because the file is of 200+MB size and the system is stuck when i open it.

plz help as soon as possible

[kazuyabo]

i need help regarding writing txt file data to access database. the file size is 200+MB

plz reply as soon as possible

Hello dude! Are you going to transfer all the data from your database to a text file?

All data i mean!