OLE drag and dropThe most likely cause of this problem is that your Main entry point does not have the [STAThread] attribute associated with it. Without this attribute, the Essential Grid support of the OLE Drag and Drop causes this error. Solution: There are two possible solutions. The first one is to add the [STAThread] attribute and remove the [MTAThread] attribute in case it is present. The second one is to remove the OLE Drag and Drop support from the Essential Grid. Solution 1: Here is a sample Main entry point with the STAThread attribute. C# [STAThread]
static void Main()
{
Application.Run(new Form1());
}
VB <STAThread> Shared Sub Main() Application.Run(New Form1()) End Sub Solution 2: To remove OLE Drag and Drop support so that your application can be MTAThread.
C# [MTAThread]
static void Main()
{
Application.Run(new Form1());
}
//In Form_Load.
//Turns AllowDrop off.
this.gridControl1.AllowDrop = false;
//Turns off the OLE options in ControllerOptions
this.gridControl1.ControllerOptions -= GridControllerOptions.OleDataSource | GridControllerOptions.OleDropTarget;
//Sets DataObjectConsumerOptions value as “None”.
this.gridControl1.DataObjectConsumerOptions = GridDataObjectConsumerOptions.None;
VB <MTAThread> Shared Sub Main() Application.Run(New Form1()) End Sub 'In Form_Load 'Turns AllowDrop off. Me.gridControl1.AllowDrop = False 'Turns off the OLE options in ControllerOptions. Me.gridControl1.ControllerOptions -= GridControllerOptions.OleDataSource Or GridControllerOptions.OleDropTarget ' Sets DataObjectConsumerOptions value as “None”. Me.gridControl1.DataObjectConsumerOptions = GridDataObjectConsumerOptions.None
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