/// <summary>
/// 交换两个gemstone位置
/// </summary>
/// <param name="g1">gemstone1</param>
/// <param name="g2">gemstone2</param>
private void Exchange(Gemstone g1, Gemstone g2)
{
// 交换列表数据中的位置
var tempG1ColumnIndex = g1.columnIndex;
var tempG1RowIndex = g1.rowIndex;
var tempG2ColumnIndex = g2.columnIndex;
var tempG2RowIndex = g2.rowIndex;
g1.columnIndex = tempG2ColumnIndex;
g1.rowIndex = tempG2RowIndex;
g2.columnIndex = tempG1ColumnIndex;
g2.rowIndex = tempG1RowIndex;
var temp = g1;
gemstoneList[tempG1RowIndex][tempG1ColumnIndex] = g2;
gemstoneList[tempG2RowIndex][tempG2ColumnIndex] = temp;
// 更新视图中的位置
g1.Move();
g2.Move();
}