以编程方式设置 wpf datagrid 单元格值

问题描述

我有一个简单的数据网格，包含 2 列，ProductCode 和 Description.
当用户在第一列中编译 ProductCode 并移至下一列时，程序应使用 Products 表中的产品描述编译 Description 单元格.
这样做的最佳方法是什么?

I have a simple datagrid with 2 columns, ProductCode and Description.
When user compile a ProductCode in the first column and move to the next column, the program should compile the Description cell with the description of the product found in the Products table.
What is the best approach to do this?

推荐答案

定义一个具有两个属性的类，ProductCode 和 Description，用于实现 INotifyPropertyChanged 接口.然后，您可以在 ProductCode 属性的 setter 中查找产品的描述，例如:

Define a class with two properties, ProductCode and Description, that implements the INotifyPropertyChanged interface. You can then lookup the description of the products in the setter of the ProductCode property, e.g.:

public class Product : INotifyPropertyChanged
{
    private string _productCode;
    public string ProductCode
    {
        get { return _productCode; }
        set
        {
            _productCode = value;
            NotifyPropertyChanged();
            LookupProduct();
        }
    }

    private string _description;
    public string Description
    {
        get { return _description; }
        set { _description = value; NotifyPropertyChanged(); }
    }

    private void LookupProduct()
    {
        //loop up product based on _productCode here
        //...and set the Description property:
        Description = "...";
    }

    public event PropertyChangedEventHandler PropertyChanged;
    private void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}

您当然也应该将 DataGrid 的 ItemsSource 属性设置或绑定到 IEnumerable.

You should of course also set or bind the ItemsSource property of the DataGrid to an IEnumerable<Product>.

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