在假期或價值變化時設置控制值

Question

當我不知道導致此行爲的原因時，很難解釋問題，但我會嘗試。

在我的形式有兩種Devexpress SpinEdit controls（該SpinEdit類表示由一個文本編輯器的控制和一對旋轉按鈕，用戶可以點擊調整值就像使用NumericUpDown）

的問題是在處理旋轉編輯1值更改事件後，我無法設置第二個旋轉編輯的值。

當窗體加載的兩個控件從數據庫中獲得的值（十進制18,2）

讓的說：

priceSpinEdit值爲100,00

discountSpinedit值是10,00

當用戶更改折扣百分比時，我需要用折扣計算價格並將價格轉換成priceWithDiscountSpinEdit

I h AVE代碼工作的順利

private void supplierDiscountPercetangeSpinEdit_EditValueChanging(object sender, DevExpress.XtraEditors.Controls.ChangingEventArgs e) 
    { 
     decimal price, percentage, calculatedPrice; 

     price = (decimal)supplierPriceSpinEdit.EditValue; 
     percentage = Convert.ToDecimal(e.NewValue, CultureInfo.InvariantCulture); 

     calculatedPrice = Popust.Izracunaj(price, percentage); 

     supplierPriceWithDiscountSpinEdit.EditValue = calculatedPrice; 

    } 

雖然焦點設置在其中我做計算supplierPriceWithDiscountSpinEdit顯示正確的計算值控制，但這種控制失去之後第二個重點值設置爲從數據庫加載值。

我在想，我需要寫的值對象，但後來我試圖把這個成簡單的按鈕，點擊它工作的（價值棒的）

private void button1_Click(object sender, EventArgs e) 
    { 
     decimal price, percentage, calculatedPrice; 

     price = (decimal)supplierPriceSpinEdit.EditValue; 
     percentage = (decimal)supplierDiscountPercetangeSpinEdit.EditValue; 

     calculatedPrice = Popust.Izracunaj(price, percentage); 

     supplierPriceWithDiscountSpinEdit.EditValue = calculatedPrice; 
    } 

所以我的問題是，爲什麼計算價格正確的值時，在第二個spinEdit中顯示，並在失去焦點後消失。

對不起，如果有必要，我可以添加更多信息。

編輯：spinedit控制

 // 
     // supplierPriceWithDiscountSpinEdit 
     // 
     this.supplierPriceWithDiscountSpinEdit.DataBindings.Add(new System.Windows.Forms.Binding("EditValue", this.productBindingSource, "SupplierPriceWithDiscount", true)); 
     this.supplierPriceWithDiscountSpinEdit.EditValue = "0,00"; 
     this.supplierPriceWithDiscountSpinEdit.EnterMoveNextControl = true; 
     this.supplierPriceWithDiscountSpinEdit.Location = new System.Drawing.Point(527, 33); 
     this.supplierPriceWithDiscountSpinEdit.MenuManager = this.barManager1; 
     this.supplierPriceWithDiscountSpinEdit.Name = "supplierPriceWithDiscountSpinEdit"; 
     this.supplierPriceWithDiscountSpinEdit.Properties.Mask.BeepOnError = true; 
     this.supplierPriceWithDiscountSpinEdit.Properties.Mask.EditMask = "n2"; 
     this.supplierPriceWithDiscountSpinEdit.Properties.Mask.MaskType = DevExpress.XtraEditors.Mask.MaskType.Numeric; 
     this.supplierPriceWithDiscountSpinEdit.Properties.Mask.UseMaskAsDisplayFormat = true; 
     this.supplierPriceWithDiscountSpinEdit.Properties.NullText = "0,00"; 
     this.supplierPriceWithDiscountSpinEdit.Properties.ValidateOnEnterKey = true; 
     this.supplierPriceWithDiscountSpinEdit.Size = new System.Drawing.Size(100, 20); 
     this.supplierPriceWithDiscountSpinEdit.TabIndex = 13; 

Answer 1

嘗試在你的綁定，像這樣使用DataSourceUpdateMode.OnPropertyChanged數據源更新模式：

supplierPriceWithDiscountSpinEdit.DataBindings.Add("EditValue", productBindingSource, "SupplierPriceWithDiscount", true, DataSourceUpdateMode.OnPropertyChanged); 

而在SpinEditEditValueChanging事件處理程序，對象屬性發生變化，讓綁定做它的工作。

private void supplierDiscountPercetangeSpinEdit_EditValueChanging(object sender, DevExpress.XtraEditors.Controls.ChangingEventArgs e) 
{ 
    decimal price, percentage, calculatedPrice; 

    price = (decimal)supplierPriceSpinEdit.EditValue; 
    percentage = Convert.ToDecimal(e.NewValue, CultureInfo.InvariantCulture); 

    calculatedPrice = Popust.Izracunaj(price, percentage); 

    productBindingSource.SupplierPriceWithDiscount = calculatedPrice; 

}