VGridOptionsBehavior.AllowRecordComparison Property

Gets or sets whether record comparison is enabled.

Namespace: DevExpress.XtraVerticalGrid

Assembly: DevExpress.XtraVerticalGrid.v25.1.dll

NuGet Packages: DevExpress.Win.Navigation, DevExpress.Win.VerticalGrid

Declaration

C#

[DefaultValue(true)]
[XtraSerializableProperty]
public virtual bool AllowRecordComparison { get; set; }

VB.NET

<DefaultValue(True)>
<XtraSerializableProperty>
Public Overridable Property AllowRecordComparison As Boolean

Property Value

Type	Default	Description
Boolean	true	true to allow users to compare records; otherwise, false

Property Paths

You can access this nested property as listed below:

Object Type	Path to AllowRecordComparison
VGridControlBase	.OptionsBehavior .AllowRecordComparison

Remarks

The VGridControl allows you to compare records if the AllowRecordComparison property is set to true.

Checkboxes appear when users hover the mouse pointer over record headers. Use checkboxes to add or remove records to/from the comparison. Another way to do this is to right-click record headers and choose Add to Comparison and Remove from Comparison.

To display the comparison, right-click the record header and choose Show Comparison from the context menu. Choose other options in the context menu like Hide Comparison and Clear Comparison to hide or clear the comparison.

Compare Records

To allow users to compare records, follow the steps below:

• Ensure that the AllowRecordComparison property is enabled.
• Set the ShowRecordHeaders property to true.
• Specify content for record headers. To do this, use the RecordHeaderFormat property or CustomRecordHeaderDisplayText event. Record headers appear only if you assign content to them.

Example

The following example toggles the AllowRecordComparison property:

C#

private void btnToggleComparison_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) {
    vGridControl1.OptionsBehavior.AllowRecordComparison = !vGridControl1.OptionsBehavior.AllowRecordComparison;
}

VB.NET

Private  Sub btnToggleComparison_ItemClick(ByVal sender As Object, ByVal e As DevExpress.XtraBars.ItemClickEventArgs)
    vGridControl1.OptionsBehavior.AllowRecordComparison = Not vGridControl1.OptionsBehavior.AllowRecordComparison
End Sub

Disable the Record Header Context Menu

To disable the header menu, set the EnableRecordHeaderMenu property to false.

Compare Records in Code

Use the following methods to compare records:

• AddToComparison — Adds a specific record to the comparison collection.

• RemoveFromComparison — Removes a specific record from the comparison collection.

• ShowComparison — Displays the selected records in a side-by-side comparison

• HideComparison — Hides the comparison.

• ClearComparison — Clears the comparison collection.

• GetComparisonRecords — Gets the indices of records in the comparison collection.

• AddSelectionToComparison — Adds the selected records to the comparison collection.

  To allow multiple record selection and use the AddSelectionToComparison method, set the MultiSelect property to true.

• IsInComparison — Indicates whether a specific record is in the comparison collection.

The following example code shows how to display record headers, add records to the comparison collection, and display the comparison:

C#

using DevExpress.Utils;
using DevExpress.XtraVerticalGrid;

private void Form1_Load(object sender, EventArgs e) {
    // Display record headers.
    vGridControl1.OptionsView.ShowRecordHeaders = true;
    // Display FirstName and LastName field values in record headers.
    vGridControl1.RecordHeaderFormat = "{FirstName} {LastName}";
    // Add records to the comparison collection.
    vGridControl1.AddToComparison(4); 
    vGridControl1.AddToComparison(5);
    vGridControl1.AddToComparison(7);
    // Display the comparison
    vGridControl1.ShowComparison();
}   

VB.NET

Imports DevExpress.Utils
Imports DevExpress.XtraVerticalGrid 

Private  Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
    ' Display record headers.
    vGridControl1.OptionsView.ShowRecordHeaders = True
    ' Display FirstName and LastName field values in record headers.
    vGridControl1.RecordHeaderFormat = "{FirstName} {LastName}"
    ' Add records to the comparison collection.
    vGridControl1.AddToComparison(4) 
    vGridControl1.AddToComparison(5) 
    vGridControl1.AddToComparison(7)
    ' Display the comparison
    vGridControl1.ShowComparison()
End Sub