大家好，我的视图中有一个下拉列表和一个提交按钮。 我希望用户能够在下拉列表中选择一个项目，该项目在控制器中调用从数据库获取数据的操作方法。
我还有一个按钮，我希望用户能够在网格中选中一个复选框，然后单击提交按钮将复选框的值传递给控制器中的操作方法。
问题是，当我从下拉列表中选择一个项目时，它会调用提交按钮“DiscontinueProduct”的操作方法， 不是dropdownlist的动作方法（“GetProductByID”），有人可以告诉我我做错了什么吗？ 这是我的代码。
提前致谢。
=============
<div>
@Using Html.BeginForm("GetProductByID", "Product")
@Html.DropDownList("CategoryID", DirectCast(ViewData("Categories"), SelectList), " -- Choose One -- ", New With {Key .onchange = "$('form').submit();"})
End Using
</div>
@Using Html.BeginForm("DiscontinueProduct", "Product")
@<text>
<table>
<tr>
<th></th>
<th>ProductName</th>
<th>SupplierID</th>
<th>CategoryID</th>
<th>Discontinued</th>
</tr>
@For Each item In Model
@<tr>
<td>
@Html.ActionLink("Edit", "Edit", New With {.id = item.ProductID}) |
@Html.ActionLink("Details", "Details", New With {.id = item.ProductID}) |
@Html.ActionLink("Delete", "Delete", New With {.id = item.ProductID})
</td>
<td>@item.ProductName</td>
<td>@item.SupplierID</td>
<td>@item.CategoryID
<input type="checkbox" name="task" id="isTaskSelected" value=" @item.CategoryID.ToString() " />
</td>
<td>@item.Discontinued</td>
</tr>
Next
</table>
<div id="btncomplete" style="display: none">
<input type="submit" value="Discontinue" />
</div>
</text>
End Using
=====================
Function GetProductByID(ByVal id As Integer) As ActionResult
Dim cquery2 = From product In db.Products
Where product.CategoryID = id
viewmodel.ProductList = cquery2.ToList()
Return PartialView("Products", viewmodel.ProductList)
Return PartialView("Products", viewmodel.ProductList)
End Function
<HttpPost()> _
Function DiscontinueProduct(ByVal collection As FormCollection) As ActionResult
Try
' Code to update product field as discontinue.
Return RedirectToAction("Index")
Catch
Return View()
End Try
End Function