评级控制中的空值问题

问题描述

hi All
我在项目中使用了评分控件，并将该评分控件与datalist绑定在一起.我使用storeprocedure和linq技术绑定了数据列表，我使用了一个名为rating table的表和一个保存avg评分，ratedto的视图，用户类型.我将评分显示为

hi All
i have used a rating control in my project.and bind that rating control in with datalist.i had bind the datalist using a storeprocedure and linq technique i have used a table named as rating table and a view which holds the avg rating,ratedto,usertype .and i am displaying the rating as

<ajaxToolkit:Rating runat="server" ID="Rating1" MaxRating="5"

                            CssClass="ratingStar" StarCssClass="ratingItem" WaitingStarCssClass="Saved"   CurrentRating= '<%#Eval("rating") %>'

                       OnChanged ="rating_Changed" FilledStarCssClass="Filled" EmptyStarCssClass="Empty" AutoPostBack="True"

                               ReadOnly ="true"  ></ajaxToolkit:Rating>

在数据列表中，我正在显示所有已评级和未评级的用户类型.它向我显示了评级控件可以将空值转换为int32类型的错误.因此，我将如何显示平均评级.我想通过5星评级来显示评级如果没有得到评分，请向我显示空星.
我将如何处理此空值并将其转换为未评级的int或零.
如果有人知道解决方案，那么请解决此问题.


在此先感谢所有人.

here in the datalist i am displaying all the usertype both rated and unrated.it shows me error that rating control can convert null value to int32 type.SO how will i display the avg rating.i want to display the rating through the 5 star rating and if those are not rated showed me with empty star.
how will i handle this null value and convert to int or zero for which are not rated.
if anybody knows the solution then please solve this.


Thanks in Advance To all.

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