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Retrieving data from an MS Access database and displaying it in a list

How to read data in ms access database and display it in a list. I have codes here, but I got errors.

 private void button3_Click(object sender, EventArgs e)
    {
        using (OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=\\Sisc-stronghold\mis!\wilbert.beltran\DataBase\DataStructure.accdb"))
        using(OleDbCommand cmd = new OleDbCommand(" SELECT * from TableAcct", conn))
        {
            conn.Open();
            OleDbDataReader Reader = cmd.ExecuteReader();
            //if (Reader.HasRows)
            if (Reader.HasRows)
            {
                Reader.Read();
                listBox1.Text = Reader.GetString("FirstName");
            }
        }

errors here: 1. Error 1. The best overloaded method matching for 'System.Data.Common.DbDataReader.GetString (int)' has some invalid arguments. 2. Error 2 Argument '1': cannot be converted from 'string' to 'int'

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7 answers

try this one

       List<String> firstName = new List<String>();
       List<String> lastName = new List<String>();

       private void loadButton_Click(object sender, EventArgs e)
       {
                cn.Open();
                OleDbDataReader reader = null;
                cmd = new OleDbCommand("select* from Records", cn);
                reader = cmd.ExecuteReader();
                while (reader.Read())
                {
                    firstName.Add(reader["FirstName"].ToString());
                    lastName.Add(reader["LastName"].ToString());
                }
                cn.Close();
       }

then in your search button paste this,

private void searchButton_Click(object sender, EventArgs e)
        {
            clearSearchResult();
            try
            {
                int totalItems = FirstName.Count;
                int count = 0;
                while (count < totalItems)
                {
                    if (textBox6.Text == FirstName[count].ToString())
                    {
                        listBox1.Items.Add(FirstName[count].ToString());
                        count = 100;
                    }
                    else
                    {
                        count++;
                    }

It is good to use if you want to show information "FirstName"in listBox1_SelectedIndexChangedif you want. here is an example

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
                int totalItems = lastName.Count;
                int count = 0;
                while (count < totalItems)
                {
                    if ((listBox1.SelectedItem.ToString()) == firstName[count].ToString()))
                    {
                        textBox1.Text = firstName[count].ToString();
                        textBox2.Text = lastName[count].ToString();
                        count = 100;
                    }
                    else
                    {
                        count++;
                    }
               }

hope this helps

+5
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GetString() int , . , .

, "FirstName" , 1:

listBox1.Text = Reader.GetString(1);

http://msdn.microsoft.com/en-us/library/system.data.oledb.oledbdatareader.getstring.aspx

+1

listBox1.Text = Reader.GetString("FirstName");


listBox1.Text = Reader.GetString(0); // zero base ordinal of column
+1

Thy While

while(reader.Read())
{
   listbox1.Items.Add(reader["FirstName"]);
}

. reader.Read() false, .

: valmue , ón reader. .

var value = reader["ColumnName"];


var value = reader.GetString(0);

- cmd.ExecuteScalar() sql, :

using(OleDbCommand cmd = new OleDbCommand("SELECT firstname from TableAcct", conn))
{
   conn.Open();
   var firstName = cmd.ExecuteScalar();
}

, "FirstName" . "order by firstname" "where someKey = 1" - , .

+1

MS Access , , , . MS Access Label. Access, , "PirFahimDataBase". Visual Studio

  • Add New Database
  • Click "Next"
  • Click "New Connection"
  • Now change the data source by clicking the "Edit" button and select the Microsoft Access database files.
  • Click Browse to select the database you created.

Now in Button ClickEvent paste this code, which will receive data from the database and show it on the label

using System.Windows.Forms; //these two lines should be written before namespace at top of the program
using System.Data.OleDb;

private void button1_Click(object sender, EventArgs e)
    {        
      System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection();
     conn.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;" +
    @"Data source= C:\Users\pir fahim shah\Documents\PirFahimDataBase.accdb";

    try
     {
     conn.Open();
     MessageBox.Show("connected successfuly");
     OleDbDataReader reader  = null;  // This is OleDb Reader
   OleDbCommand cmd = new OleDbCommand("select TicketNo from Table1 where Sellprice='6000' ", conn);
    reader = cmd.ExecuteReader();
    while (reader.Read())
    {
     label1.Text= reader["TicketNo"].ToString();           

    }

}
    catch (Exception ex)
{
    MessageBox.Show("Failed to connect to data source");
}
finally
{
    conn.Close();
}    
 }//end of button click event
+1
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Your error on this line:

listBox1.Text = Reader.GetString("FirstName");

You must pass a number in a function GetString().

0
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DataColumn[] PrimaryKeyColumn = new DataColumn[1]; //Define Primary coloumn
DataSet dataSet = new DataSet();
DataTable dataTable = new DataTable();
ReadAndUpdateExcel.ReadExcel(strPath, sheetName, out dataSet);
dataSet.Tables.Add(dataTable);
PrimaryKeyColumn[0] = dataSet.Tables[0].Columns[0];
dataSet.Tables[0].PrimaryKey = PrimaryKeyColumn;
string num = dataSet.Tables[0].Rows[dataSet.Tables[0].Rows.IndexOf(dataSet.Tables[0].Rows.Find(strTCName))]["ACNO"].ToString();
//string country
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