deleting the data using dataset and data adapter..

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I am writing code for deleting data from the database.

In the below code I am getting an exception error that no primary key is set in the database. I set the cell as a primary key to again check that but same exception appears again.

I am not sure how to do this. This code is wrong. I set the code but the code is not getting data from the cell textbox in the form. I don't know how to do this.. How it can edit it? Please help me to correct his code.

C#

try
            {
                MAconn = new OleDbConnection();
                MAconn.ConnectionString = connectionString;
                MAconn.Open();
                DataSet oDS = new DataSet();
                string query = "SELECT * FROM info";

                OleDbDataAdapter oOrdersDataAdapter = new OleDbDataAdapter(query, connectionString);

                OleDbCommandBuilder oOrdersCmdBuilder = new OleDbCommandBuilder(oOrdersDataAdapter);

                oOrdersDataAdapter.Fill(oDS);

                DataTable pTable = oDS.Tables["Table"];
                pTable.TableName = "info";

                // deleting data ( main code goes from here)
                
                
                DataRow oOrderRow = oDS.Tables["info"].Rows.Find("cell"); 
                oOrderRow.Delete();
               
                oOrdersDataAdapter.Update(oDS, "info");
                MessageBox.Show("deleted");
            }
            catch (Exception ex)
            { MessageBox.Show("some prob" + ex); }

Edit: Added pre tags.

Posted 30-Apr-11 22:26pm

codegeekalpha

Updated 30-Apr-11 22:30pm

dan!sh

v3

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2 solutions

Solution 1

Set the following for the adapter:

oOrdersDataAdapter.MissingSchemaAction = System.Data.MissingSchemaAction.AddWithKey;

Hope this helps.

Posted 30-Apr-11 22:40pm

dan!sh

v2

Comments

codegeekalpha 1-May-11 4:54am

no helping..

dan!sh 1-May-11 5:00am

Do you have a primary key set in the database?

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Rahul_Patel · Accepted Answer · 2011-04-30T23:05:00

SqlDataAdapter da;
SqlCommandBuilder cmd;
DataSet ds;
private void Form1_Load(object sender, EventArgs e)
{
    da = new SqlDataAdapter("select * from emp","Connection string");
    cmd = new SqlCommandBuilder(da);
    ds = new DataSet();
    da.Fill(ds,"myemp");
    dataGridView1.DataSource = ds.Tables[0];
}

private void delete_Click(object sender, EventArgs e)
{
    int position = 0;
    foreach (DataRow item in ds.Tables["myemp"].Rows)
    {
        if(item["id"].ToString() == textBox1.Text)
                    break;
                position++;
    }
    ds.Tables["myemp"].Rows[position].Delete();
    da.Update(ds.Tables["myemp"]);
    MessageBox.Show("successful");
}