在 Page_Load 将 GridViewComboBoxColumn 绑定到数据源

Question

我有一个带有 GridViewComboBoxColumn 列的网格。我有一个数据源，它是一个对象列表。我需要在 Page_Load 中分配数据。这不起作用：

protected void Page_Load() {
    GridViewDataComboBoxColumn gridColumn = Grid.Columns["NumericData"]
        as GridViewDataComboBoxColumn;

    gridColumn.PropertiedropsComboBox.DataSource = DataSourceMadeUpOfAList;
    gridColumn.PropertiesComboBox.TextField = "SpelledOutNumbers";
    gridColumn.PropertiesComboBox.ValueField = "ActualNumbers";
...

我看过这里：Binding GridViewComboBoxColumn to a datasource

这确实有效，但仅限于编辑表单。我启用了过滤器行，并且还需要填充这些下拉列表。上述解决方案不适用于过滤器（原因很明显）。任何想法都表示赞赏。

谢谢。

Answer 1

此代码在这里可以正常工作。请确保 ValueField 的类型和 ComboBoxColumn 绑定的列的类型（column.FieldName）相同。最后，这是我的例子：

    <dx:ASPxGridView ID="ASPxGridView1" Width="100%"  ClientInstanceName="grid"
    DataSourceID="SqlDataSource2" KeyFieldName="ProductID" AutoGenerateColumns="False" runat="server">
    <Columns>
        <dx:GridViewCommandColumn VisibleIndex="0">
            <ClearFilterButton Visible="True">
            </ClearFilterButton>
        </dx:GridViewCommandColumn>
        <dx:GridViewDataTextColumn FieldName="ProductID" ReadOnly="True" VisibleIndex="0">
            <EditFormSettings Visible="False" />
        </dx:GridViewDataTextColumn>
        <dx:GridViewDataTextColumn FieldName="ProductName" VisibleIndex="1">
        </dx:GridViewDataTextColumn>
        <dx:GridViewDataTextColumn FieldName="SupplierID" VisibleIndex="2">
        </dx:GridViewDataTextColumn>
        <dx:GridViewDataComboBoxColumn FieldName="CategoryID" VisibleIndex="3">
            <PropertiesComboBox ValueType="System.String">
            </PropertiesComboBox>
        </dx:GridViewDataComboBoxColumn>
    </Columns>
</dx:ASPxGridView>

        <asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
            ProviderName="<%$ ConnectionStrings:ConnectionString.ProviderName %>" SelectCommand="SELECT * FROM [Products]">
        </asp:SqlDataSource>



    protected void Page_Load(object sender, EventArgs e) {
        GridViewDataComboBoxColumn col = ASPxGridView1.Columns["CategoryID"] as GridViewDataComboBoxColumn;
        col.PropertiesComboBox.DataSource = GetDataSource();
        col.PropertiesComboBox.ValueField = "Id";
        col.PropertiesComboBox.TextField = "Text";
    }

...


public class Record {
    public Record(int id) {
        this.id = id;
        this.text = "Row " + id.ToString();
    }

    private int id;
    public int Id {
        get { return id; }
        set {
            id = value;
        }
    }
    private string text;
    public string Text {
        get { return text; }
    }