Error : Update requires a valid UpdateCommand when passed DataRow collection with modified rows

Question

I am using Paging to show data in datagridview, but when i try to Update any data with updatebutton data should be updated In datagridview

Answer 1

It could be that you are missing Primary Key in the table. You need to make sure primary key is set on a column in your data base table.

Answer 2

You have Created the OleDbDataAdapter with a Select command only:

adp1 = new OleDbDataAdapter(cmd1);

OleDbDataAdapter requires valid Update, Insert, Delete commands to be used to save the data like this:

adp1.Update(dt);//here I am getting error

You just need to use a OleDbCommandBuilder that will generate the commands for you:

adp1 = new OleDbDataAdapter();
adp1.SelectCommand = cmd1; // cmd1 is your SELECT command
OleDbCommandBuilder cb = new OleDbCommandBuilder(adp1);

EDIT

Since you change the Select command of the OleDbDataAdapter at runtime for paging, what your need is to initialize each time you save data:

private void button1_Click(object sender, EventArgs e)
    {
        try
        {                
            adp1.SelectCommand = cmd1; // cmd1 is your SELECT command
            OleDbCommandBuilder cb = new OleDbCommandBuilder(adp1);
            adp1.Update(dt); //here I hope you won't get error :-)
        }
        catch (Exception err)
        {
            MessageBox.Show(err.Message.ToString());
        }

    }

Answer 3

I had to alter my (incrementing) index column to the primary key of my table (as Eaint suggest). After this, I had to pull up the DataSet.xsd in designer view, right click on the visual DataTable object and select configure. When the TableAdapter Configuration Wizard opened, I clicked the Advanced Options button. I checked the Generate Insert, Update and Delete statements checkbox then OK and Finish. After this (still in designer view), I selected the visual TableAdapter object which gave me all the full properties. The SQL was autogenerated. Took a while for me to track this down, so I hope it helps someone.

Answer 4

Thanks to "@Chris" the code above works for me. I needed to specify the Database Table name that will be updated when I Update. You can read more about that here: DataAdapter: Update unable to find TableMapping['Table'] or DataTable 'Table'

    // This Adapter and Dataset are used for Populating my datagridview, so I use them also when I need to Update the Datagridview

    SqlDataAdapter kundeTlfAdapter;
    DataSet kundeTlfDataSet; 

        try
        {
            SqlConnection connection = new SqlConnection("Data source=BG-1-PC\\SQLEXPRESS; Database = Advokathuset; User Id = abc; Password = abc;");
            SqlCommand cmd1 = new SqlCommand("Select* From Kunde_Tlf", connection);
            SqlCommandBuilder builder = new SqlCommandBuilder(kundeTlfAdapter);
            kundeTlfAdapter.SelectCommand = cmd1; // cmd1 is your SELECT command

            kundeTlfAdapter.Update(kundeTlfDataSet, "Kunde_Tlf"); //I get eror here if I dont add the name of the table that needs Update "Kunde_Tlf"
        }
        catch (Exception err)
        {
            MessageBox.Show(err.Message.ToString());
        }