ObjectDataSource.Select（）不总是射击网页提交 [英] ObjectDataSource.Select() not always firing on page postback

问题描述

我有一个表格：

• 1文本框（MyTextBox）


• 3复选框（MyCheckBox1，MyCheckBox2，MyCheckBox3）


• 1提交按钮（MySubmitButton）


• 1 ObjectDataSource控件（MyObjectDataSource）


• 1的GridView（MyGridView）

我的ObjectDataSource是这样的：

My ObjectDataSource looks like this:

<asp:ObjectDataSource ID="MyObjectDataSource" runat="server"
                          SelectMethod="MySelectMethod"
                          TypeName="MyTypeName">
    <SelectParameters>
        <asp:ControlParameter Name="MyRegularString"
                              Type="String"
                              ControlID="MyTextBox"
                              PropertyName="Text" />

        <asp:Parameter Name="MySpecialString"
                       Type="String" />
    </SelectParameters>
</asp:ObjectDataSource>

第二个参数（MySpecialString）充满这样的：

The second parameter ("MySpecialString") is filled like this:

Protected Sub MyObjectDataSource_Selecting(...) Handles MyObjectDataSource.Selecting

   Dim MySpecialString As String = "Key1=" & MyCheckBox1.Checked.ToString & ";" & _
                                   "Key2=" & MyCheckBox2.Checked.ToString & ";" & _
                                   "Key3=" & MyCheckBox3.Checked.ToString & ";"

   e.InputParameters.Item("MySpecialString") = MySpecialString

End Sub

每当我改变MyTextBox的价值和preSS MySubmitButton，MyObjectDataSource的选择方法被调用，一切工作正常。

Whenever I change the value of MyTextBox and press MySubmitButton, the select method of MyObjectDataSource is invoked and everything works OK.

但是，如果我改变我的任何复选框值（不改变MyTextBox的值）和preSS MySubmitButton，选择方法不会被调用，所以MyObjectDataSource_Selecting事件不会发生，我得到相同的结果如前

But if I change the value of any of my check boxes (without changing the value of MyTextBox) and press MySubmitButton, the select method is not invoked, thus the "MyObjectDataSource_Selecting" event doesn't take place and I get the same results as before.

我发现来解决，这是明确的调用方法MyGridView.DataBind每当MySubmitButton被点击的方法之一。这是处理这些类型的参数的最好方法？我很害怕的是，这可能会导致选择的方法被调用两次制作网页速度较慢。

One way I found to work around this was to explicitly invoke MyGridView.DataBind method whenever MySubmitButton was clicked. Is this the best way to handle these type of parameters? What I am afraid is that this may cause the select method to be called twice making the page slower.

感谢您事先的任何帮助。

Thanks in advance for any help.

CD

推荐答案

这是我终于实现了。

1. 替换所有的ASP：用ASP ControlParameters：参数


2. 显式调用MyGridView.DataBind方法每当MySubmitButton被点击了。

我检查和选择方法不会被调用两次这样做的时候。

I checked and the select method is not invoked twice when doing this.

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