Question

我目前正在开发一个项目，该项目使用ObjectDataSources和GridView控件来运行一些数据库访问和更新。

我遇到的当前问题是，当单击gridview中的“更新”按钮时，会抛出异常错误。根据我的理解，这个错误似乎是说网格视图将许多参数传递给update语句。

我希望它发送2个对象，“orignal_Incident”和“incident”，它们应该包含我需要的所有字段。但它似乎也传递了“DateClosed”和“Description”字段。

是否有可能编辑gridview发送的参数？或者还有什么需要做才能使这项工作？

以下是与该部分程序有关的代码和错误：

错误：

ObjectDataSource'obsIncidents'找不到具有参数的非泛型方法'UpdateIncident'：original_Incident，incident，DateClosed，Description。

ObjectDataSource的ASP.NET代码

<asp:ObjectDataSource ID="obsIncidents" runat="server" OldValuesParameterFormatString="original_{0}" SelectMethod="GetCustomerIncidents" TypeName="IncidentDB" UpdateMethod="UpdateIncident">
    <SelectParameters>
        <asp:ControlParameter ControlID="ddlCustomer" Name="CustomerID" PropertyName="SelectedValue" Type="Int32" />
    </SelectParameters>
    <UpdateParameters>
        <asp:Parameter Name="original_Incident" Type="Object" />
        <asp:Parameter Name="incident" Type="Object" />
    </UpdateParameters>
</asp:ObjectDataSource>

GridView的ASP.NET代码

<asp:GridView ID="gvIncidents" runat="server" AutoGenerateColumns="False" DataSourceID="obsIncidents" CellPadding="4" ForeColor="#333333" GridLines="None">
    <AlternatingRowStyle BackColor="White" />
    <Columns>
        <asp:BoundField DataField="IncidentID" HeaderText="ID" ReadOnly="True" ControlStyle-Width="30" />
        <asp:BoundField DataField="ProductCode" HeaderText="Product Code" ReadOnly="True" ControlStyle-Width="70" />
        <asp:BoundField DataField="DateOpened" DataFormatString="{0:d}" HeaderText="Date Opened" ReadOnly="True" ControlStyle-Width="70" />
        <asp:BoundField DataField="DateClosed" HeaderText="Date Closed" DataFormatString="{0:d}" ControlStyle-Width="70" ApplyFormatInEditMode="True" />
        <asp:BoundField DataField="Title" HeaderText="Title" ReadOnly="True" ControlStyle-Width="150" />

        <asp:TemplateField HeaderText="Description" ControlStyle-Width="300" >
        <ItemTemplate>
            <asp:Label ID="lblDescription" runat="server" Text='<%# Eval("Description") %>' Width="300"></asp:Label>
        </ItemTemplate>
        <EditItemTemplate>
            <asp:TextBox ID="txtDescription" runat="server" Text='<%# Bind("Description") %>' Width="300" Rows="4" TextMode="MultiLine"></asp:TextBox>
        </EditItemTemplate>
        </asp:TemplateField>

        <asp:CommandField ButtonType="Button" ShowEditButton="True" />
    </Columns>
    <EditRowStyle BackColor="#2461BF" />
    <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
    <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
    <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
    <RowStyle BackColor="#EFF3FB" />
    <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
    <SortedAscendingCellStyle BackColor="#F5F7FB" />
    <SortedAscendingHeaderStyle BackColor="#6D95E1" />
    <SortedDescendingCellStyle BackColor="#E9EBEF" />
    <SortedDescendingHeaderStyle BackColor="#4870BE" />
</asp:GridView>

类文件中的Visual Basic更新方法

<DataObjectMethod(DataObjectMethodType.Update)>
Public Shared Function UpdateIncident(
        ByVal original_Incident As Incident,
        ByVal incident As Incident) As Integer
    Dim con As New SqlConnection(TechSupportDB.GetConnectionString)
    Dim up As String = "UPDATE Incidents " &
                       "SET DateClosed = @DateClosed, " &
                       "Description = @Description " &
                       "WHERE IncidentID = @original_IncidentID " &
                       "AND ProductCode = @original_ProductCode " &
                       "AND DateOpened = @original_DateOpened " &
                       "AND (DateClosed = @original_DateClosed " &
                       "OR DateClosed IS NULL " &
                       "AND @original_DateClosed IS NULL) " &
                       "AND Title = @original_Title " &
                       "AND Description = @original_Description"
    Dim cmd As New SqlCommand(up, con)
    If incident.DateClosed = #12:00:00 AM# Then
        cmd.Parameters.AddWithValue("DateClosed", DBNull.Value)
    Else
        cmd.Parameters.AddWithValue("DateClosed", incident.DateClosed)
    End If
    cmd.Parameters.AddWithValue("Description", incident.description)
    cmd.Parameters.AddWithValue("original_IncidentID", original_Incident.IncidentID)
    cmd.Parameters.AddWithValue("original_ProductCode", original_Incident.ProductCode)
    cmd.Parameters.AddWithValue("original_DateOpened", original_Incident.DateOpened)
    If original_Incident.DateClosed = #12:00:00 AM# Then
        cmd.Parameters.AddWithValue("original_DateClosed", DBNull.Value)
    Else
        cmd.Parameters.AddWithValue("original_DateClosed", original_Incident.DateClosed)
    End If
    cmd.Parameters.AddWithValue("original_Title", original_Incident.title)
    cmd.Parameters.AddWithValue("original_Description", original_Incident.description)
    con.Open()
    Dim i As Integer = cmd.ExecuteNonQuery()
    con.Close()
    Return i
End Function

Answer 1

AzureShadow，

只需将OldValuesParameterFormatString =“original_ {0}”更改为OldValuesParameterFormatString =“{0}”。它应该完美！我认为您的案例和this case非常相似。看看那篇文章。很清楚。

使用ObjectDataSource更新ASP.NET中的GridView

1 个答案: