public VM_EditExpression(string exp, double ration, string format)
{
ExpressionString = exp;
_ratio = ration;
_format = format;
BudgetVars = new ObservableCollection <BudgetVar>(BudgetVar.GetAll());
}
public VM_AddBudget(Action <VM_BudgetItem> action = null)
{
ModelNew = new VM_BudgetItem(new BudgetItem());
BudgetGroups = BudgetGroup.GetAll();
_budgetVars = BudgetVar.GetAll();
_updateAction = action;
}
private void Initialize()
{
// 所有预算和所有变量
var list = BudgetGroup.GetAll();
var budgetVars = BudgetVar.GetAll();
BudgetItems = new ObservableCollection <VM_BudgetItem>();
foreach (var itemGroup in list)
{
if (itemGroup.BudgetItems == null)
{
continue;
}
foreach (var item in itemGroup.BudgetItems)
{
var vb = new VM_BudgetItem(item)
{
GroupName = itemGroup.Name
};
BudgetItems.Add(vb);
var expression = item.Expression;
budgetVars.ForEach(bv =>
{
if (expression.Contains(bv.Name))
{
expression = expression.Replace(bv.Name, bv.GetQuantities());
}
});
try
{
vb.QuantitieString = string.Format(item.Format, Convert.ToDouble(new System.Data.DataTable().Compute(expression, null)) * item.Ratio);
}
catch (Exception ex)
{
vb.QuantitieString = "计算出错";
}
}
}
collectionView = CollectionViewSource.GetDefaultView(BudgetItems);
collectionView.GroupDescriptions.Add(new PropertyGroupDescription("GroupName"));
}