LayoutChanging Event | ActiveReports 19 .NET Edition

LayoutChanging Event

In This Topic

Raised when the layout is changing and passes the sender a new EventArgs class called LayoutChangingArgs.

Syntax

Visual Basic
C#

'Declaration
 
Public Event LayoutChanging As LayoutChangingEventHandler

public event LayoutChangingEventHandler LayoutChanging

Remarks

This event provides a mechanism to monitor and potentially cancel changes to the report's layout before they are applied. It can be useful for enforcing constraints, validating changes, or implementing custom behavior in response to layout adjustments.

Handlers can inspect the event arguments to determine the nature of the proposed change and decide whether to allow it, modify it, or prevent it from occurring.

Example

Visual Basic

Private Sub ardMain_LayoutChanging(ByVal sender As Object, ByVal e As Design.LayoutChangingArgs) Handles ardMain.LayoutChanging
    If e.Type = Design.LayoutChangeType.SectionDelete Then
        Dim Result As DialogResult
        Result = MessageBox.Show("Are you sure you want to delete this section?", "Delete?", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1)
        If Result = DialogResult.Cancel Then
            e.AllowChange = False
        Else
            e.AllowChange = True
        End If
    End If
End Sub

private void ardMain_LayoutChanging(object sender, GrapeCity.ActiveReports.Design.LayoutChangingArgs e) 
{ 
    if (e.Type == Design.LayoutChangeType.SectionDelete)  
    {  
        DialogResult Result;  
        Result = MessageBox.Show("Are you sure you want to delete this section?", "Delete?", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1);  
        if (Result == DialogResult.Cancel)  
        {  
            e.AllowChange = false;  
        }  
        else  
        {  
            e.AllowChange = true;  
        }  
    }  
}

Reference

Designer Class
Designer Members