Thrown system.exception.stackoverflowexception C#

Question

In my C# windows form application, there is a combo box that has 3 options in it, when selecting second one a switch command that checks options of another combo box throws and exception of type stack overflow, with this details:

System.StackOverflowException occurred

HResult=0x800703E9
Source=<Cannot evaluate the exception source>
StackTrace:
<Cannot evaluate the exception stack trace>

Update:

this is the event of index change in combo box:

private void cmbxDoorType_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (cmbxDoorType.SelectedIndex == 0)
        {
            chkTopBlock.Enabled = true;
            if(chkTopBlock.Checked)
                cmbxTopBlockConfig.Enabled = true;
            cmbxTopSideConfig.Enabled = true;
            txtDoorHeight.ReadOnly = false;
            txtTotalWidth.Visible = false;
            lblTotalWidth.Visible = false;
            lblDoorBaleWidth.Enabled = false;

        }
        else if (cmbxDoorType.SelectedIndex == 1)
        {
            txtTotalWidth.Visible = false;
            lblTotalWidth.Visible = false;
            lblDoorBaleWidth.Enabled = false;
            cmbxTopBlockConfig.Enabled = false;
            chkTopBlock.Enabled = false;
            txtDoorHeight.ReadOnly = true;
            cmbxTopSideConfig.Enabled = false;
        }
        else
        {
            chkTopBlock.Enabled = true;
            if (chkTopBlock.Checked)
                cmbxTopBlockConfig.Enabled = true;
            cmbxTopSideConfig.Enabled = true;
            txtDoorHeight.ReadOnly = false;
            txtTotalWidth.Visible = true;
            lblTotalWidth.Visible = true;
            lblDoorBaleWidth.Enabled = true;

        }
        Prediction();
    }

this is the prediction methode than exception ocours in:

internal void Prediction ()
    {
        if (Globals.ProjectType=="Gama")
        {
            int TotalHeight_=0;
            double DesignHeight_=0;
            int TotalWidth_=0;
            double LeftDis = 0;
            double RightDis = 0;
            double RowsTotalHeight_=0;
            double TopBlockHeight_=0;
            double thisDoorHeight_ = 0;
            int DoorHeight_=0;
            int DoorWidth_=0;
            double DoorBaleWidth_=0;
            try
            {
                switch (cmbxLeftSideConfig.SelectedIndex)  //exception thrown here
                {
                    case 0:
                        LeftDis = GamaGlobals.Constants.BeamThickness - GamaGlobals.Constants.InsertOffset;
                        break;
                    case 2:
                        LeftDis = GamaGlobals.Constants.GP115Body + GamaGlobals.Constants.BeamThickness - GamaGlobals.Constants.InsertOffset;
                        break;
                    case 3:
                        LeftDis = GamaGlobals.Constants.GP114Body + GamaGlobals.Constants.BeamThickness - GamaGlobals.Constants.InsertOffset;
                        break;
                    case 4:
                        LeftDis = GamaGlobals.Constants.GP117Height - GamaGlobals.Constants.InsertOffset;
                        break;
                    case 1:
                        LeftDis = 0;
                        break;
                }

                switch (cmbxRightSideConfig.SelectedIndex)
                {
                    case 0:
                        RightDis = GamaGlobals.Constants.BeamThickness - GamaGlobals.Constants.InsertOffset;
                        break;
                    case 2:
                        RightDis = GamaGlobals.Constants.GP115Body + GamaGlobals.Constants.BeamThickness - GamaGlobals.Constants.InsertOffset;
                        break;
                    case 3:
                        RightDis = GamaGlobals.Constants.GP114Body + GamaGlobals.Constants.BeamThickness - GamaGlobals.Constants.InsertOffset;
                        break;
                    case 4:
                        RightDis = GamaGlobals.Constants.GP117Height - GamaGlobals.Constants.InsertOffset;
                        break;


     case 1:
                            RightDis = 0;
                            break;
                    }
}

Answer 1

cmbxDoorType_SelectedIndexChanged中的cmbxDoorType_SelectedIndexChanged事件或另一个SelectedIndexChanged事件将再次重新触发您的事件，这使它在cmbxDoorType_SelectedIndexChanged为StackOverFlowException

Answer 2

in "prediction" method there was a line that changes a textbox value, and that text box itself has a value changed event that triggers "prediction" again.

so it's solved.

just as another question, is there a way to change textbox/numericupdown controls value programmatically without triggering its change event? for example, if the user changes it, it triggers event but when its programmatically changed, the event does not trigger. hm??