ASP.Net單選按鈕不會改變狀態

Question

在一個asp.net窗體中，我有一組單選按鈕，全部使用相同的組ID。在相同的表單上我有一個重置按鈕。在重置按鈕的代碼中，我設置了我希望成爲缺省值的單選按鈕，如rb.Checked = true。問題是單選按鈕的選中狀態不會改變。爲什麼不？

ASP.Net：

<asp:Table ID="tblFullText" runat="server" Width="95%" HorizontalAlign="Center" Font-Size="10pt" CellSpacing="0" 
BorderWidth="1px" CellPadding="0" GridLines="Both" BorderStyle="Solid" BorderColor="#c0c0c0"> 
    <asp:TableRow HorizontalAlign="Center" BackColor="LightSteelBlue" Font-Bold="True"> 
    <asp:TableCell ColumnSpan="3" Font-Bold="true" Text="FULL TEXT SEARCH PARAMETERS"></asp:TableCell> 
    </asp:TableRow> 
    <asp:TableRow HorizontalAlign="Center" BackColor="LightSteelBlue" Font-Bold="True"> 
    <asp:TableCell Width="50%" Text="Search Criteria"></asp:TableCell> 
    <asp:TableCell Width="17%" Text="Query Operator"></asp:TableCell> 
    <asp:TableCell Width="33%" Text="Query Expression Type"></asp:TableCell> 
    </asp:TableRow> 
    <asp:TableRow> 
    <asp:TableCell Width="50%" HorizontalAlign="Center"><asp:textbox id="tbFullTextSearchCriteria" runat="server" Width="98%"></asp:textbox></asp:TableCell> 
    <asp:TableCell Width="17%" HorizontalAlign="Center"> 
    <asp:RadioButton runat="server" GroupName="QueryOp" ID="rbQueryOpAnd" Text="<b>AND</b>" />&nbsp;&nbsp;&nbsp;&nbsp; 
    <asp:RadioButton runat="server" GroupName="QueryOp" ID="rbQueryOpOR" Text="<b>OR</b>" /> 
    </asp:TableCell> 
    <asp:TableCell Width="33%" HorizontalAlign="Center"> 
    <asp:RadioButton runat="server" GroupName="QueryExpType" ID="rbQueryExpTypeAll" Text="<b>All Words</b>" />&nbsp;&nbsp; 
    <asp:RadioButton runat="server" GroupName="QueryExpType" ID="rbQueryExpTypeAny" Text="<b>Any Word</b>" />&nbsp;&nbsp; 
    <asp:RadioButton runat="server" GroupName="QueryExpType" ID="rbQueryExpTypeExact" Text="<b>Exact Phrase</b>" />&nbsp;&nbsp; 
    <asp:RadioButton runat="server" GroupName="QueryExpType" ID="rbQueryExpTypeExpr" Text="<b>Expression</b>" /> 
    </asp:TableCell> 
    </asp:TableRow> 
</asp:Table> 

後面的代碼：

Protected Sub btnClearFields_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnClearFields.Click 

    rbQueryOpAnd.Checked = True 

    End Sub 

Answer 1

您還需要在同一組設置其他RadioButton s到假的。

Protected Sub btnClearFields_Click(ByVal sender As Object, ByVal e As EventArgs) 
    Handles btnClearFields.Click 

    rbQueryOpAnd.Checked = True 
    rbQueryOpOR.Checked = False 

End Sub 

如果你不希望其他RadioButton設置爲false，你需要使用RadioButtonList。