ObjectDatasource插入引发错误(使用业务对象)

快速概述

• 尝试使用ObjectDatasource(在GridView上)插入业务对象
• 获取以下错误

ObjectDatasource“ObjectDatasource1”没有要插入的值。检查“values”字典是否包含值。

项目设置

• 人-简单的虚拟业务对象(名称和年龄)
• PersonBinder-保留对象数据源的方法(在本例中选择并插入)
• insert grid-简单网格(继承gridview)在页脚添加一个“添加”按钮,Inturn调用数据源的insert
• 默认-aspx页,保存网格和数据源,(将插入参数应用于数据源)

注意:我在周围添加了TODO注释,我认为这是关键领域

代码

人绑定器 遗漏了这个人(它的get 2属性)这里是活页夹

/// <summary>
/// A binding Class.
/// </summary>
public class PersonBinder
{

    public IEnumerable<Person> Select()
    {
        List<Person> people = new List<Person>();

        for (int i = 0; i < 9; i++)
        {
            Person person = new Person();
            person.Name = "Name " + i.ToString();
            person.Age = i;
            people.Add(person);
        }

        return people;
    }


    public void Insert(Person p)
    {
        //TODO: the Insert Method
        //errors before this.
    }
}

插入网格

public class InsertGrid : GridView
{
    protected override void OnInit(System.EventArgs e)
    {
        base.OnInit(e);
        ShowFooter = true;
        DataBind();
    }


    /// <summary>
    /// here to handle button clicks.
    /// </summary>
    private void ModeCommand(object sender, CommandEventArgs e)
    {
        switch (e.CommandName)
        {
            case "Add":

                //ObjectDataSource objectDataSource = DataSource as ObjectDataSource;
                ObjectDataSource objectDataSource = Parent.FindControl(DataSourceID) as ObjectDataSource;

                if (objectDataSource != null)
                {
                    //TODO: Errors HERE!
                    objectDataSource.Insert();
                }
                break;

        }


    }

    /// <summary>
    /// Raises the <see cref="E:System.Web.UI.WebControls.GridView.RowDataBound"/> event.
    /// </summary>
    /// <param name="e">A <see cref="T:System.Web.UI.WebControls.GridViewRowEventArgs"/> that contains event data.</param>
    protected override void OnRowDataBound(GridViewRowEventArgs e)
    {
        base.OnDataBound(e);
        //add an insert button
        if (e.Row.RowType == DataControlRowType.Footer)
        {

            ImageButton ibtnAdd = new ImageButton();
            ibtnAdd.ID = "Add";
            ibtnAdd.CommandName = "Add";
            ibtnAdd.ToolTip = "Add new Item";
            ibtnAdd.ImageAlign = ImageAlign.AbsMiddle;
            ibtnAdd.Style.Add("cursor", "pointer");
            ibtnAdd.CausesValidation = true;
            ibtnAdd.Command += ModeCommand;
            ibtnAdd.Enabled = true;
            e.Row.Cells[0].Controls.Add(ibtnAdd);

        }
    }
}

默认HTML

<form id="form1" runat="server">
<div>

    <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" 
        DataObjectTypeName="GridViewSample.Person" InsertMethod="Insert" 
        SelectMethod="Select" TypeName="GridViewSample.PersonBinder">
    </asp:ObjectDataSource>
</div>
<br />
<cc1:InsertGrid ID="InsertGrid1" runat="server" AutoGenerateColumns="False" 
    DataSourceID="ObjectDataSource1">
    <Columns>
        <asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
        <asp:BoundField DataField="Age" HeaderText="Age" SortExpression="Age" />
    </Columns>
</cc1:InsertGrid>
</form>

默认代码隐藏

public partial class _Default : System.Web.UI.Page
{
    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
        //TODO: here is the insert PARAMs. what am i missing.
        ObjectDataSource1.InsertParameters.Add("Name", "");
        ObjectDataSource1.InsertParameters.Add("Age", "0");
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        //TODO: Tried this too
        IDataSource ds = ObjectDataSource1;
        DataSourceView view = ds.GetView(InsertGrid1.DataMember);
        Dictionary<string, string> values = new Dictionary<string, string>();
        values.Add("Name", "");
        //values.Add("Age", "0");

        view.Insert(values, delegate { return false; });
    }
}