[英]how to bind dictionary or array to UIelement / Image control
我有2到6個隨機隨機dynamically added
圖像控件,並且每個字典都有包含該控件數據的字典/數組,即x1, x2, y1, y1, ans
。
如何將數組分配或綁定到每個圖像控件?
基本上,我正在制作拖放功能,為此,我使用了畫布並將圖像放置在其中。 所以當我將image1
拖到rect_1
區域(放下image1的空間)時,我想測試image1.ans
,其中包含一個數字,即1
與rect_1.ans
相匹配,以查看image1
是否在正確的rect
以標記為正確的位置。
我已經搜索過,但是沒有找到如何實現我的情況, 這篇文章使用了xaml,但是我需要在后面的代碼中使用它。 請為此指導我。
這是添加image1
代碼, For now i am not dynamically creating dictionary
_draggedImageData = new Dictionary<string, int>
{
{"x1", 11},
{"x2", 144},
{"y1", 123},
{"y2", 143},
{"ss", 0},
{"a", 0}
};
_draggedImageData["width"] = (int)Math.Sqrt(Math.Pow(_draggedImageData["x2"] - _draggedImageData["x1"], 2) + Math.Pow(_draggedImageData["y2"] - _draggedImageData["y1"], 2)); //Math.Sqrt( Math.Pow(x2 - x1, 2) + Math.Pow(y2 - y1, 2))
_draggedImageData["height"] = _draggedImageData["y2"] - _draggedImageData["y1"]; // y2-y1
// Create a CroppedBitmap.
_cb = new CroppedBitmap(bitmapImage, new Int32Rect(_draggedImageData["x1"], _draggedImageData["y1"], _draggedImageData["width"], _draggedImageData["height"])); //x1, y1 : select region rect
var croppedImage = new Image{Source = _cb};
Canvas.SetLeft(croppedImage, _draggedImageData["x1"]); //x1
Canvas.SetTop(croppedImage, _draggedImageData["y1"]); //y1
_canvas.Children.Add(croppedImage);
這是檢查其位置是否相同的代碼。
private void CanvasMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (_draggedImage == null) return;
var position = e.GetPosition(_canvas);
//<m x1="332" x2="465" y1="68" y2="86" ss="1" a="0"></m>
_draggedImageData2 = new Dictionary<string, int>
{
{"x1", 332},
{"x2", 465},
{"y1", 68},
{"y2", 86},
{"ss", 1},
{"a", 0}
};
_draggedImageData2["width"] = (int)Math.Sqrt(Math.Pow(_draggedImageData2["x2"] - _draggedImageData2["x1"], 2) + Math.Pow(_draggedImageData2["y2"] - _draggedImageData2["y1"], 2)); //Math.Sqrt( Math.Pow(x2 - x1, 2) + Math.Pow(y2 - y1, 2))
_draggedImageData2["height"] = _draggedImageData2["y2"] - _draggedImageData2["y1"]; // y2-y1
var myRectangle = new Rect { Location = new Point(Canvas.GetLeft(_draggedImage), Canvas.GetTop(_draggedImage)), Size = new Size(_draggedImageData["width"], _draggedImageData["height"]) };
var myRectangle2 = new Rect { Location = new Point(_draggedImageData2["x2"], _draggedImageData2["y2"]), Size = new Size(_draggedImageData2["width"], _draggedImageData2["height"]) };
var doesIntersect = myRectangle.IntersectsWith(myRectangle2);
if (doesIntersect)
{
var croppedImage = new Image
{
Source = _cb,
Margin = new Thickness(_draggedImageData2["x1"], _draggedImageData2["y1"], 0.0, 0.0)
};
_canvas.Children.Add(croppedImage);
//here i want to test if (draggedImageData2["a"] == myRectangle2["a"]) qArr[0].ans = 1; but i don't have myRectangle2 with dictionary values attached.
}
Canvas.SetLeft(_draggedImage, _draggedImageData["x1"]);
Canvas.SetTop(_draggedImage, _draggedImageData["y1"]);
_canvas.ReleaseMouseCapture();
_draggedImage = null;
}
使用控件的'Tag'對象屬性並向其添加自定義數據,但是Rect
沒有Tag
屬性。
_draggedImageData = new Dictionary<string, int>
{
{"x1", 11},
{"x2", 144},
{"y1", 123},
{"y2", 143},
{"ss", 0},
{"a", 0}
};
var croppedImage = new Image{Source = _cb};
croppedImage.Tag = _draggedImageData;
var _draggedImageData3 = new Dictionary<string, int>();
_draggedImageData3 = (Dictionary<string, int>)croppedImage.Tag;
感謝您的澄清。 如果您看看我幾周前給試圖畫棋盤的人的答案 ,可能會有所幫助。 本質上,問題是相同的,即試圖在畫布上渲染圖像列表。 我個人將創建一個類來封裝字典中的所有這些字段,但是如果您確實需要字典,那么它也將起作用,您只需將XAML綁定修改為使用字典即可。
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