RowProperties.UnboundDataType Property

Allows you to make the row unbound, and specify the type of data it stores.

Namespace: DevExpress.XtraVerticalGrid.Rows

Assembly: DevExpress.XtraVerticalGrid.v24.2.dll

Declaration

C#

[DXCategory("Data")]
public Type UnboundDataType { get; set; }

VB.NET

<DXCategory("Data")>
Public Property UnboundDataType As Type

Property Value

Type	Description
Type	The type of data to store in the unbound row.

Remarks

If the UnboundDataType property is not set to a valid data type (the property’s default value is System.Void), the current row is considered bound to a data source field (RowProperties.FieldName).

To switch a row to unbound mode, do the following:

• Set the UnboundDataType property to the type of values this row should store.
• Assign a unique field name to the RowProperties.FieldName property. The field name must not match the field name of another row nor the name of a data source field.
• Use one of the following techniques to populate the unbound row with data:
  • Specify an expression (RowProperties.UnboundExpression) to calculate unbound values. Users cannot edit row cells if you specify an expression.
  • Handle the VGridControl.CustomUnboundData event to specify unbound row values. Rows populated in this way remain editable.

See the following help topic for more information: Unbound Rows.

Example

In the following example, it is assumed that the Vertical Grid is bound to a table that contains the “Quantity”, “UnitPrice” and “Discount” fields. The code below adds an unbound row that calculates the total order amount according to the following expression: Quantity*UnitPrice*(1-Discount).

C#

using DevExpress.XtraVerticalGrid;
using DevExpress.XtraVerticalGrid.Rows;
using DevExpress.Data;
using DevExpress.Utils;
using DevExpress.XtraVerticalGrid.Events;

// Unbound row.
EditorRow rowTotal = null;

private void Form1_Load(object sender, EventArgs e) {
    // ...
    vGridControl1.CustomUnboundData += new CustomDataEventHandler(vGridControl1_CustomUnboundData);
    // Create and initialize the unbound Total row.
    rowTotal = new EditorRow();
    rowTotal.Properties.Caption = "Total";
    rowTotal.Properties.FieldName = "Total";
    // Specify format settings.
    rowTotal.Properties.Format.FormatType = FormatType.Numeric;
    rowTotal.Properties.Format.FormatString = "c";            
    // Disable edit operations.
    rowTotal.Properties.ReadOnly = true;            
    vGridControl1.Rows.Add(rowTotal);
    rowTotal.Properties.UnboundDataType = typeof(decimal);
    // Customize the appearance settings.
    rowTotal.Appearance.BackColor = Color.FromArgb(179, 226, 221);
    rowTotal.Appearance.Font = new System.Drawing.Font(rowTotal.Appearance.Font, 
        System.Drawing.FontStyle.Bold);
}

// Provide data for the Total row.
private void vGridControl1_CustomUnboundData(object sender, CustomDataEventArgs e) {
    VGridControl vGrid = sender as VGridControl;
    if (e.Row == rowTotal && e.IsGetData) {
        DataRowView row = (DataRowView)vGrid.GetRecordObject(e.ListSourceRowIndex);
        decimal unitPrice = Convert.ToDecimal(row["UnitPrice"]);
        decimal quantity = Convert.ToDecimal(row["Quantity"]);
        decimal discount = Convert.ToDecimal(row["Discount"]); ;
        e.Value = unitPrice * quantity * (1 - discount);
    }
}

VB.NET

Imports DevExpress.XtraVerticalGrid
Imports DevExpress.XtraVerticalGrid.Rows
Imports DevExpress.Data
Imports DevExpress.Utils
Imports DevExpress.XtraVerticalGrid.Events

' Unbound row.
Dim rowTotal As EditorRow

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    '...
    AddHandler VGridControl1.CustomUnboundData, AddressOf VGridControl1_CustomUnboundData
    ' Create and initialize the unbound Total row.
    rowTotal = New EditorRow()
    rowTotal.Properties.Caption = "Total"
    rowTotal.Properties.FieldName = "Total"
    ' Specify format settings.
    rowTotal.Properties.Format.FormatType = FormatType.Numeric
    rowTotal.Properties.Format.FormatString = "c"
    ' Disable edit operations.
    rowTotal.Properties.ReadOnly = True
    VGridControl1.Rows.Add(rowTotal)
    rowTotal.Properties.UnboundDataType = GetType(Decimal)
    ' Customize the appearance settings.
    rowTotal.Appearance.BackColor = Color.FromArgb(179, 226, 221)
    rowTotal.Appearance.Font = New System.Drawing.Font(rowTotal.Appearance.Font, _
        System.Drawing.FontStyle.Bold)
End Sub

' Provide data for the Total row.
Private Sub VGridControl1_CustomUnboundData(ByVal sender As System.Object, _
    ByVal e As CustomDataEventArgs)
    Dim vGrid As VGridControl = sender
    If e.Row Is rowTotal And e.IsGetData Then
        Dim row As DataRowView = vGrid.GetRecordObject(e.ListSourceRowIndex)
        Dim unitPrice As Decimal = Convert.ToDecimal(row("UnitPrice"))
        Dim quantity As Decimal = Convert.ToDecimal(row("Quantity"))
        Dim discount As Decimal = Convert.ToDecimal(row("Discount"))
        e.Value = unitPrice * quantity * (1 - discount)
    End If
End Sub