ObjectDataSource與GridView結合使用 ，更新資料時，不知怎么控制。

Question

ObjectDataSource與GridView結合使用 ，GridView上的某一列使用模板列，此列的EditItemTemplate填充一個TEXTBOX
<EditItemTemplate>
         <asp:TextBox ID="txtDescription" runat="server" Text=<%# Bind("Description")%>></asp:TextBox>
</EditItemTemplate>
現問題如下：
我要控制此TEXTBOX為空時，不能保存。
但是ObjectDataSource與GridView結合使用的話，就不好控制阿。
見如下：
 protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {            if (((TextBox)(GridView1.Rows[e.RowIndex].FindControl("txtDescription"))).Text.ToString().Trim() == "")
            {
                //this.ObjectDataSource1.UpdateMethod = "";
            }
        }
請教各位給點提示

Answer 1

难道没有人明白我的意思吗？我的意思就是我有个字段不能为空，所以当TEXTBOX为空，想不执行ObjectDataSource的UpdateMethod

Answer 2

aspx代碼  :
    
<asp:GridView ID="GridView1" DataKeyNames ="CategoryID" runat="server" AutoGenerateColumns="False" DataSourceID ="ObjectDataSource1" OnRowUpdating ="GridView1_RowUpdating" OnRowEditing ="GridView1_RowEditing">
            <Columns>
                <asp:TemplateField HeaderText="種類名稱">
                    <EditItemTemplate>
                        <asp:TextBox ID="txtCategoryName" runat="server" Text=<%# Bind("CategoryName")%>></asp:TextBox>
                    </EditItemTemplate>
                    <FooterTemplate>
                        <asp:TextBox ID="txtCategoryName" runat="server" ></asp:TextBox>
                    </FooterTemplate>
                    <ItemTemplate>
                        <asp:Label ID="lblCategoryName" runat="server" Text=<%# Eval("CategoryName")%> Width="96px"></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="名稱解釋">
                    <EditItemTemplate>
                        <asp:TextBox ID="txtDescription" runat="server" Text=<%# Bind("Description")%>></asp:TextBox>
                    </EditItemTemplate>
                    <FooterTemplate>
                        <asp:TextBox ID="txtDescription" runat="server"></asp:TextBox>
                    </FooterTemplate>
                    <ItemTemplate>
                        <asp:Label ID="lblDescription" runat="server" Text=<%# Eval("Description")%> Width="116px"></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="編輯">
                    <EditItemTemplate>
                        <asp:Button ID="Button4" runat="server" Text="保   存" CommandName="Update"  OnClick ="btnUpdate_Click"/>
                        <asp:Button ID="Button5" runat="server" Text="取   消" CommandName="Cancel"/>
                    </EditItemTemplate>
                    <FooterTemplate>
                        <asp:Button ID="Button3" runat="server" Text="新  增" CommandName="New" />
                    </FooterTemplate>
                    <ItemTemplate>
                        <asp:Button ID="Button1" runat="server" Text="修  改"  CommandName="Edit"/>
                        <asp:Button ID="Button2" runat="server" Text="刪  除"  CommandName="Delete" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
        
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server"  TypeName ="DataAccess.test.ManufactureDAO" SelectMethod ="GetListCategories" DeleteMethod ="DeleteCategories" UpdateMethod ="UpdateCategories" InsertMethod ="AddCategories">
            <InsertParameters>
                        <asp:Parameter Name ="CategoryName" Type ="string" />
                        <asp:Parameter Name="Description" Type="string" />
             </InsertParameters>
             
            <DeleteParameters ><asp:Parameter Name ="CategoryID" Type ="int32" /></DeleteParameters>
            
            <UpdateParameters >
                        <asp:Parameter Name ="CategoryName" Type ="string" />
                        <asp:Parameter Name="Description" Type="string" />
                        <asp:Parameter Name ="CategoryID" Type ="int32" />
            </UpdateParameters>
            
        </asp:ObjectDataSource>cs代碼  ：        protected void btnUpdate_Click(object sender, EventArgs e)
        { 
            //if ()此處若獲取到修改行的TEXTBOX就可以控制
        }protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            if (((TextBox)(GridView1.Rows[e.RowIndex].FindControl("txtDescription"))).Text.ToString().Trim() == "")
            {
                  //此處怎么阻止ObjectDataSource1更新數據庫？
                  this.ObjectDataSource1.UpdateMethod = "";
            }
        }

Answer 3

objectdatasource.updateing事件里处理private void obs_Updating(object source, ObjectDataSourceMethodEventArgs e) {  // The names of the parameters are the same as
  // the variable names for the method that is invoked to
  // perform the Update. The InputParameters collection is
  // an IDictionary collection of name/value pairs,
  // not a ParameterCollection.
  if(string.IsNullEmpty（e.InputParameters[输入参数名]）)
  {
     e.Cancel = true;
  }
}

Answer 4

protected void obs_Updating(object source, ObjectDataSourceMethodEventArgs e) 
        {               // The names of the parameters are the same as 
              // the variable names for the method that is invoked to 
              // perform the Update. The InputParameters collection is 
              // an IDictionary collection of name/value pairs, 
              // not a ParameterCollection. 
            if (string.IsNullOrEmpty(Convert.ToString(e.InputParameters["Description"])))
              {
                 Response.Write("<script>alert('不能為空！');</script>");
                 e.Cancel = true; 
              } 
       } 
whycom
太感謝你了，呵呵