[InvalidCastException: 对象不能从 DBNull 转换为其他类型。]
System.DBNull.System.IConvertible.ToDateTime(IFormatProvider provider) +52
System.Convert.ToDateTime(Object value) +32
NewsDetail.showContent() in d:\wwwroot\vxzh\wwwroot\NewsDetail1.aspx.cs:108
NewsDetail.Page_Load(Object sender, EventArgs e) in d:\wwwroot\vxzh\wwwroot\NewsDetail1.aspx.cs:66
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
System.Web.UI.Control.OnLoad(EventArgs e) +95
System.Web.UI.Control.LoadRecursive() +59
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +678
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