Question

我有双数组列表。某些值是预定义的。我想将此列表绑定到DataGrid。实际上，datagrid单元格是用字典值填充的组合框。这个想法是用户从下拉列表中选择任何值，并使用双数组将相应的Key写入List。代码如下：

        Dictionary<int, string> scores = new Dictionary<int, string>();                                   
        scores.Add(1, "the same");
        scores.Add(3, "moderate superiority");
        scores.Add(5, "strong superiority");
        scores.Add(7, "very strong superiority");
        scores.Add(9, "extremely superiority");


        //define number of alternatives
        int num = Alternatives.Children.Count - 1;

        //initialize matrix for assessment scores
        List<double[]> gridAssessment = new List<double[]>();
        for (int i = 0; i < num; i++)
        {                
            gridAssessment.Add(new double[num]);
        }

        //set initial values
        for (int i = 0; i < num; i++)
        {
            gridAssessment[i][i] = scores.ElementAt(0).Key;                
        }

        //define source for assessment grid
        grAssessment.ItemsSource = gridAssessment;
        grAssessment.AutoGenerateColumns = false;            


        //add columns to the grid
        for (int i = 0; i < num; i++)
        {
            DataGridComboBoxColumn col = new DataGridComboBoxColumn();               
            grAssessment.Columns.Add(col);
            col.Width = new DataGridLength(1, DataGridLengthUnitType.Star);

            //define source for comboboxes
            col.ItemsSource = scores;                
            col.DisplayMemberPath = "Value";
            col.SelectedValuePath = "Key";
            string a = "[" + i.ToString() + "]";
            Binding t = new Binding(a);
            t.Mode = BindingMode.TwoWay;                
            col.SelectedValueBinding = t;

实际上，当我从下拉列表中选择任何值时，会出现验证标记。你能帮我解决这个问题吗？

非常感谢。

Answer 1

问题在于：

//initialize matrix for assessment scores
List<double[]> gridAssessment = new List<double[]>();
for (int i = 0; i < num; i++)
{
    gridAssessment.Add(new double[num]);
}

检查“输出”窗口，表示“无法转换回来”。因此，当它尝试将double转换回int时，它有一个问题。如果将此更改为int以匹配“得分”数据类型，则验证将消失。

固定代码：

//initialize matrix for assessment scores
List<int[]> gridAssessment = new List<int[]>();
for (int i = 0; i < num; i++)
{
    gridAssessment.Add(new int[num]);
}

WPF将字典绑定到组合框

1 个答案: