求救:dataGridView绑定动态变化的数据出错
做了一个简单的考试软件
一个简单的考试软件(C/S)
//考生数据库装入
OleDbConnection   myConnection   =   new   OleDbConnection(@ "Provider=Microsoft.Jet.OLEDB.4.0;Data   Source= "   +   databaseFileName);
DataSet   myDataSet   =   new   DataSet();

OleDbDataAdapter   myOleDbDataAdapter   =   new   OleDbDataAdapter( "   SELECT   *   FROM   TestTable ",   myConnection);
myOleDbDataAdapter.Fill(myDataSet,   "TestTable ");

//设置myDataSet的主键
DataColumn[]   keys   =   new   DataColumn[1];
keys[0]   =   myDataSet.Tables[ "TestTable "].Columns[ "考号 "];
myDataSet.Tables[ "TestTable "].PrimaryKey   =   keys;

dataGridView1.AutoGenerateColumns   =   true;
dataGridView1.DataSource   =   myDataSet;
dataGridView1.DataMember   =   "TestTable ";

//在dataGridView中用右键菜单简单筛选,考试状态字段,剩余时间字段在动态变化
                private   void   toolStripMenuItem_Click(object   sender,   EventArgs   e)
                {
                        Monitor.Enter(this);//多个线程读或写myDataSet,控制同步访问
                        DataView   dv   =   myDataSet.Tables[0].DefaultView;
                        if(ToolStripMenuItem1==(ToolStripMenuItem)sender)
                                dv.RowFilter   =   "考试状态= '正在考试 ' ";//筛选正在考试的记录
                        else   if(ToolStripMenuItem2==(ToolStripMenuItem)sender)
                                dv.RowFilter   =   "考试状态= '考试完毕 ' ";
                        else   if(ToolStripMenuItem3==(ToolStripMenuItem)sender)
                                dv.RowFilter   =   "考试状态= '网络错误 ' ";
                        else   if(ToolStripMenuItem4==(ToolStripMenuItem)sender)
                                dv.RowFilter   =   "考试状态   LIKE   '* ' ";
                        this.dataGridView1.DataSource   =   dv;
                        Monitor.Exit(this);
                }
不用筛选内容填充dataGridView1时,显示没问题
但选 "正在考试 "筛选后,有的学生记录从 "正在考试 "变成 "考试完毕 "(在一个timer中修改myDataSet)后退出当前视图时出错:
The   following   exception   occurred   in   the   DataGridView:
System.IndexOutOfRangeException:Index   5   does   not   have   a   value,
    at   System.Windows.Forms.CurrencyManger.get_Item(Int32   index)
    at   System.Windows.Forms.DataGridView.DataGridViewDataConnection.GetError(Int32   rowIndex)