在 WPF 中将形状放入网格中

Question

I'm trying to dynamicaly add a shape to a grid, I'm creating and setting it this way :

Rectangle theRect = new Rectangle();
currentRect = theRect;

theRect.VerticalAlignment = Windows.UI.Xaml.VerticalAlignment.Top;
theRect.HorizontalAlignment = Windows.UI.Xaml.HorizontalAlignment.Left;

theRect.Margin = new Thickness(oldPos.X,oldPos.Y,0,0);

theRect.StrokeThickness = brushWidht;
theRect.Stroke = new SolidColorBrush(brushColor);

theRect.Height = newPoint.Y - oldPos.Y;
theRect.Width = newPoint.X - oldPos.X;

theBoard.Children.Add(theRect);

But it sticks to the corner of "theBoard" which is the grid where I put it. Does anybody can help me with this ? Thanks.

Answer 1

Since you've decided to have a Grid for the parent, I suppose you're trying to put your shape in different "cells", ie in different rows and columns. You can do that with the following code:

Grid.SetRow(theRect, 1);
Grid.SetColumn(theRect, 1);

If you want to set the absolute position of the shape in the parent then a Canvas would be a better choice. In this case you could set the offset of the shape inside the parent using the following code:

Canvas.SetLeft(theRect, oldPos.X);
Canvas.SetTop(theRect, oldPos.Y);

I hope this answers your question.