ObjectDataSource插入引发错误(使用的业务对象)
-
06-09-2019 - |
题
简要概述
- 试图插入一个商业目的使用ObjectDataSource(在内)
- 获得以下错误
ObjectDataSource'ObjectDataSource1'没有值的插入。检查的价值观'的字典中包含的价值观。
项目设置
- 人-简单的虚拟业务对象(姓名和年龄)
- PersonBinder-保持该方法的目的数据库(选择,并插入在这种情况下)
- InsertGrid-简单的网(继承了内)添加"增加"按钮,在页脚,哪些合格实习的电话的数据源插入
- 默认ASPX页,拥有了网和数据源,(适用插入参数的DataSorce)
注意我加入TODO评论周围,什么,我认为是关键领域
代码
人粘合剂 失踪的人(其获得2)在这里是粘合剂
/// <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.
}
}
InsertGrid
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; });
}
}
解决方案
以下不实际的工作。
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; });
什么我要做的就是删除/更换
//TODO: Errors HERE!
objectDataSource.Insert();
不隶属于 StackOverflow