I have an Struct...
public
struct PointStruct{
public Point FirstPoint;
public Point FinalPoint;
public string Tipo;
public string MuebleTipo;
}
[in my form]
PointStruct[] Lista = new PointStruct[99];
// guide
public string tipodibujo = "";
public string tipomueble = "";
then a event
// OnMouseDown
private void CartesianPlane_MouseDown(object sender, MouseEventArgs e)
{
// if left click
if (e.Button == MouseButtons.Left)
{
// HERE IS THE PROBLEM
// get mouse coords and set struct
Lista[j] = new PointStruct();
Lista[j].FirstPoint.X = e.X;
Lista[j].FirstPoint.Y = e.Y;
a.X = e.X;
a.Y = e.Y;
// other
Lista[j].Tipo = tipodibujo;
if (Lista[j].Tipo == "Furniture")
{
Lista[j].MuebleTipo = tipomueble;
}
// show line guide
pinta = true;
}
else
{
// hide line guide
pinta = false;
}
}
[The Problem]
I select another event (menuitem) there i change the values of
// Bath
private void MuebleItemBano_Click(object sender, EventArgs e)
{
this.tipodibujo = "Furniture";
this.tipomueble = "Bath";
}
Then i pass to another task, where i call the Event OnMouseDown, there:
the Lista[j].FirstPoint get the eX, e.Y values successfuly...
but Lista[j].Tipo and Lista[j].MuebleTipo dont get any value, they are in Null, why ...
Please help
Can not set value to variable...
Mohideen99
Please download the code here for full example code...
lcVic
The first step is to trace through the code by setting breakpoints in both events, to make sure the second one is firing, and check the state of the various variables when the first one runs afterward.
FKy
Philippe.Jung
Mohammed A.AboBakr
Where is j being set Are you sure you've stepped through and you're saying the values don't go into the array at all
Why do you have an array of 99 values It looks to me like you have a dynamic number of structs and should be using a list
Pham Vu Khanh
You should get rid of the array and use a list, so that you can support more than 99 items, and also get rid of j. You should also use more descriptive variable names.
I think your problem may be here:
// Get Point public Point PuntoPerpendicular(Point a, Point b){
Point punto = new Point(); // hace que punto a sea el origenb.X = b.X - a.X;
b.Y = b.Y - a.Y;
// lo rota 90° y luego lo entrega al formulario siguiendo la formula // donde & = 90° // x = xcos& - ysen& // y = xsen& + ycos&punto.X = -b.Y + a.X;
punto.Y = b.X + a.Y;
return punto;}
You have a member variable named b, but are you trying to use the member variable, or the b you've passed in In either case, your core problem is poor variable naming. Use this.b to specify you want to set the member variable.
I suspect if you move to using a List<PointStruct> you'll solve your problem along the way.
MBritten
Bill CC
No, I will try to explain it better...
1 step, select from my Menu, the kind of "Line" to draw ... "Wall" for example, then tipodibujo = "Wall";
2 step, mouse down, to set the first point (100,100), (here we create the struct) and set the current values:
Struct.FirstPoint.X = 100,
Struct.FirstPoint.Y = 100;
Struct.Tipo = "Wall"; // must be Wall
3 step, mouseUp to set the FinalPoint (200,200) and increment "j", and show the tipodibujo value in the Statusbar Label this works greate until i want to save the "drawing"...
4 step, select save option in menu, here i write an xml file ... here my app crash, because every struct have a null value in the Tipo field...
this means:
Struct.FirstPoint = 100,100;
Struct.FinalPoint = 200,200;
Struct.Tipo = Null; // but we set the string value before...
Riekey
I did, but the value the value has change... i test it with...
// MouseUp Event
StatusLabelCoords.Text = e.Location.ToString();
StatusLabelDibujo.Text = tipodibujo;
the MenuItem Event works, because in my statusbar Label I can see the value... tipodibujo
but the Struct in this case Lista[j].Tipo can get the value...
rodolfo allendes
No worries, glad to help.