明日网络考试系统源码第二次考试时出错：索引超出范围。必须为非负值并小于集合大小。<br/><br/>请哪些高手解决！！<br/><br/> <br/>“/netexam”应用程序中的服务器错误。 <i>索引超出范围。必须为非负值并小于集合大小。<br/>参数名: index</i> <font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif"><b>说明: </b>执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。 <br/><br/><b>异常详细信息: </b>System.ArgumentOutOfRangeException: 索引超出范围。必须为非负值并小于集合大小。<br/>参数名: index<br/><br/><b>源错误:</b> <br/><br/><table class="t_table" cellspacing="1" cellpadding="4" style="width:98%;background: #ffffcc;"><tr><td>行 120:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{行 121:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;int_row2 += 1;<font color="red">行 122:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;　 CheckBoxList cbl = (CheckBoxList)(DataList2.Items[int_row2 - 1].FindControl(&quot;CheckBoxList1&quot;));</font>行 123:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;行 124:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if (cbl.SelectedValue == &quot;&quot;)</td></tr></table><br/><b><font face="Verdana">源文件: </font></b>f:\asp练习\发布的网站\NetExam\QianUser\StartExamfra.aspx.cs<b><font face="Verdana">&nbsp;&nbsp;&nbsp;&nbsp;行: </font></b>122 <br/><br/><b><font face="Verdana">堆栈跟踪:</font></b> <br/><br/><table class="t_table" cellspacing="1" cellpadding="4" style="width:98%;background: #ffffcc;"><tr><td>[ArgumentOutOfRangeException: 索引超出范围。必须为非负值并小于集合大小。参数名: index]&nbsp;&nbsp; System.Collections.ArrayList.get_Item(Int32 index) +2776269&nbsp;&nbsp; System.Web.UI.WebControls.DataListItemCollection.get_Item(Int32 index) +10&nbsp;&nbsp; QianUser_StartExamfra.getCom(Int32 i) in f:\asp练习\发布的网站\NetExam\QianUser\StartExamfra.aspx.cs:122&nbsp;&nbsp; QianUser_StartExamfra.btnSubmit_Click(Object sender, EventArgs e) in f:\asp练习\发布的网站\NetExam\QianUser\StartExamfra.aspx.cs:36&nbsp;&nbsp; System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105&nbsp;&nbsp; System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107&nbsp;&nbsp; System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7&nbsp;&nbsp; System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11&nbsp;&nbsp; System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33&nbsp;&nbsp; System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102</td></tr></table></font>