Updating DATAGRID Row To Save To SQL

Hi Guys I am trying to understand how to save and edited row to the database private void BudgetGrid_RowEditEnding(object sender, DataGridRowEditEndingEventArgs e) { SqlCom

Solution 1:

Just copy below codes. I've created all the thing of you and tested successfully. Rather than the first way, I tried to let you go more popular way. Therefore, it took me time to adopt..

Hope this helps you !

SqlDataAdapter da;
DataTable dt;

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        SqlConnection Conn = new SqlConnection();
        Conn.ConnectionString = yourConnectionString;
        Conn.Open();

        SqlCommand gridcomm = new SqlCommand();
        gridcomm.Connection = Conn;

        gridcomm.CommandText = "SELECT Id, Name, Quantity, Rate, Time FROM Budget";

        da = new SqlDataAdapter(gridcomm);

        SqlDataReader gridreader = gridcomm.ExecuteReader();
        while (gridreader.Read())
        {
        }
        gridreader.Close();

        dt= new DataTable("Budget");
        da.Fill(dt);

        dataGrid_Budget.ItemsSource = dt.DefaultView;

        Conn.Close();

    }

    private void dataGrid_Budget_RowEditEnding(object sender, System.Windows.Controls.DataGridRowEditEndingEventArgs e)
    {
        DataGridRow editedrow = e.Row;

        int row_index = (DataGrid)sender).ItemContainerGenerator.IndexFromContainer(editedrow);

        for (int k=0;k< 5;k++)
        {
            DataGridCell cell = GetCell(row_index, k);
            TextBlock tb = cell.Content as TextBlock;

            if (k==1)
            {
                dt.Rows[row_index][k] = tb.Text;
            }
            else if (k == 4)
            {
                if (tb.Text != "")
                {
                    dt.Rows[row_index][k] = Convert.ToDateTime(tb.Text);
                }
            }
            else
            {
                dt.Rows[row_index][k] = Convert.ToInt32(tb.Text);
            }
        }

        da.UpdateCommand = new SqlCommandBuilder(da).GetUpdateCommand();

        da.Update(dt);
    }




    public DataGridCell GetCell(int row, int column)
    {
        DataGridRow rowContainer = GetRow(row);

        if (rowContainer != null)
        {
            DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer);

            DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
            if (cell == null)
            {
                dataGrid_Budget.ScrollIntoView(rowContainer, dataGrid_Budget.Columns[column]);
                cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
            }
            return cell;
        }
        return null;
    }

    public DataGridRow GetRow(int index)
    {
        DataGridRow row = (DataGridRow)dataGrid_Budget.ItemContainerGenerator.ContainerFromIndex(index);
        if (row == null)
        {
            dataGrid_Budget.UpdateLayout();
            dataGrid_Budget.ScrollIntoView(dataGrid_Budget.Items[index]);
            row = (DataGridRow)dataGrid_Budget.ItemContainerGenerator.ContainerFromIndex(index);
        }
        return row;
    }

    public static T GetVisualChild<T>(Visual parent) where T : Visual
    {
        T child = default(T);
        int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
        for (int i = 0; i < numVisuals; i++)
        {
            Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
            child = v as T;
            if (child == null)
            {
                child = GetVisualChild<T>(v);
            }
            if (child != null)
            {
                break;
            }
        }
        return child;
    }

Solution 2:

Your SQL syntax has to be corrected like,

SqlCommand update_comm = new SqlCommand();
update_comm.Connection = Conn;
update_comm.CommandText = "UPDATE Budget SET id= @u_id, Name= @u_name  WHERE person= @psn";

var update_da = new SqlDataAdapter(update_comm);
update_da.SelectCommand.Parameters.Add(new SqlParameter("@u_id", SqlDbType.Int));
update_da.SelectCommand.Parameters["@u_id"].Value = yourintvalue;

update_da.SelectCommand.Parameters.Add(new SqlParameter("@u_name", SqlDbType.NVarChar));
update_da.SelectCommand.Parameters["@u_name"].Value = yourstringvalue;

update_da.SelectCommand.Parameters.Add(new SqlParameter("@psn", SqlDbType.NVarChar));
update_da.SelectCommand.Parameters["@psn"].Value = yourstringvalue;

var update_ds = new DataSet();
update_da.Fill(update_ds);

'UPDATE' should be used with 'SET' together.

And if you want to update the actual SQL database with the value of edited rows of DataGrid, please try this.

da.UpdateCommand = new SqlCommandBuilder(da).GetUpdateCommand();

da.Update(griddt); 

Solution 3:

SqlConnection uniConn = null;
SqlCommand cmd = null;
SqlDataAdapter sda = null;
DataTable dt = new DataTable();
uniConn = new SqlConnection(
    "server=localhost;" + "Trusted_Connection=yes;" +
    "database=Production; " + "connection timeout=30");
cmd = new SqlCommand("UPDATE Budget(id, Name, Quantity, Rate, Time)",
    uniConn);
uniConn.Open();
sda = new SqlDataAdapter(cmd);
sda.Fill(dt);
BudgetGrid.ItemsSource = dt.DefaultView;
uniConn.Close();

Did you forget to close the connection?