BindingNavigator

Question

Hi, The binding navigator is a pretty cool tool. However unless it has data connected to it is disabled. Sometime I present data that is not bound but would still like to use the tool (rather than create my own) to navigate through (and heres an old term coming) the recordset. Does anyone know how to use it unbound or if not any chance of having an 'Unbound' mode of operation.

Regards

AssemblyWasMoreFun

Answer 1

Hi - This question seems to be specifically related to BindingNavigator. You will want to ask this in Windows Forms Data Controls and Databinding forums.

Thanks,
Emre

Answer 2

Hi AssemblyWasMoreFun,

From your description, I think you only wanted to use the UI elements and operations of the BindingNavigator Control without binding any data source. You only need to do two things:

1.      Enable the items of the BindingNavigator.

2.      Cope with the Click events of the items.

 

The code snippet below shows how to do that:

 

        private void Form1_Load(object sender, EventArgs e)

        {

            //Init data in the grid view.

            InitDataGridView();

            //Init navigator.

            InitBindingNavigator();

        }

 

        private void InitDataGridView()

        {

            this.dataGridView1.AllowUserToAddRows = false;

 

            this.dataGridView1.Columns.Add("id", "id");

            this.dataGridView1.Columns.Add("name", "name");

 

            this.dataGridView1.Rows.Add(2);

            this.dataGridView1.Rows[0].Cells["id"].Value = "01";

            this.dataGridView1.Rows[0].Cells["name"].Value = "Jim";

            this.dataGridView1.Rows[1].Cells["id"].Value = "02";

            this.dataGridView1.Rows[1].Cells["name"].Value = "Peter";

        }

 

        private void InitBindingNavigator()

        {

            //Eable the items

            foreach (ToolStripItem item in this.bindingNavigator1.Items)

            {

                item.Enabled = true;

            }

 

            //Initialize the count and position

            this.bindingNavigatorCountItem.Text = String.Format("of({0})", this.dataGridView1.Rows.Count);

            this.bindingNavigatorPositionItem.Text = "0";

 

            this.dataGridView1.CurrentCellChanged += new EventHandler(dataGridView1_CurrentCellChanged);

 

            //Handle add and delete event

            this.bindingNavigatorAddNewItem.Click += new EventHandler(bindingNavigatorAddNewItem_Click);

            this.bindingNavigatorDeleteItem.Click += new EventHandler(bindingNavigatorDeleteItem_Click);

            this.bindingNavigatorMoveFirstItem.Click += new EventHandler(bindingNavigatorMoveFirstItem_Click);

            this.bindingNavigatorMoveNextItem.Click += new EventHandler(bindingNavigatorMoveNextItem_Click);

 

            //Handle other events

        }

 

        private void dataGridView1_CurrentCellChanged(object sender, EventArgs e)

        {

            //Set the position

            this.bindingNavigatorPositionItem.Text = this.dataGridView1.CurrentCell.RowIndex.ToString();

        }

 

        private void bindingNavigatorAddNewItem_Click(object sender, EventArgs e)

        {

            //Add new item

            this.dataGridView1.Rows.Add();

            //Refresh the count

            this.bindingNavigatorCountItem.Text = String.Format("of({0})", this.dataGridView1.Rows.Count);

        }

 

        private void bindingNavigatorDeleteItem_Click(object sender, EventArgs e)

        {

            //Delete selected rows.

            DataGridViewRow[] delRows = new DataGridViewRow[this.dataGridView1.SelectedRows.Count];

            this.dataGridView1.SelectedRows.CopyTo(delRows, 0);

            foreach (DataGridViewRow row in delRows)

            {

                this.dataGridView1.Rows.Remove(row);

            }

            //Refresh the count

            this.bindingNavigatorCountItem.Text = String.Format("of({0})", this.dataGridView1.Rows.Count);

        }

 

        private void bindingNavigatorMoveFirstItem_Click(object sender, EventArgs e)

        {

            //Select the first item

            this.dataGridView1.CurrentCell = this.dataGridView1.Rows[0].Cells[this.dataGridView1.CurrentCell.ColumnIndex];

        }

 

        private void bindingNavigatorMoveNextItem_Click(object sender, EventArgs e)

        {

            //Select the next item

            int index = this.dataGridView1.CurrentRow.Index + 1;

            index = index % this.dataGridView1.Rows.Count;

            this.dataGridView1.CurrentCell = this.dataGridView1.Rows[index].Cells[this.dataGridView1.CurrentCell.ColumnIndex];

        }

 

Let me know if this helps.
Aland Li

 

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