数据库问题!弄了一天了!不得不来这里请教!
     请看以下两个事件得代码:
在运行时出现这样的异常:
未处理的“System.InvalidOperationException”类型的异常出现在 system.data.dll 中
其他信息:当传递具有新行的 DataRow 集合时,更新要求有效的 InsertCommand。
代码:
                  //添加新纪录事件
		private void MIAddRecord_Click(object sender, System.EventArgs e)
		{
			DialogResult result;
			result = MessageBox.Show (this,"确定要添加新纪录嘛?","提示",MessageBoxButtons.YesNo ,
				                                                         MessageBoxIcon.Question,
				                                                         MessageBoxDefaultButton.Button1 );
			if(result ==DialogResult.Yes )
			{
				
				//所有控件设置为空
				textBoxName.Text = "";
				comboBoxSex.SelectedIndex =0;
				textBoxYear.Text = "";
				comboBoxMonth.SelectedIndex = 0;
				comboBoxDay.SelectedIndex = 0;
				textBoxBelong.Text = "";
				textBoxStar.Text ="";
				textBoxPhone.Text = "";
				textBoxMobile.Text ="";
				textBoxAddress.Text = "";
				textBoxOicq.Text = "";
				textBoxMail.Text = "";
				pictureBox.Image = null;
			
				
				buttonSaveNew.Enabled = true;
			}
		
		}
		//保存新纪录事件
		private void buttonSaveNew_Click(object sender, System.EventArgs e)
		{
			//在DataSet中新增一行
			DataRow myRow = myDataSet.Tables ["Records"].NewRow ();
			//为行中各字段赋值
			myRow["用户名"] = currentUser;
			myRow["姓名"]=textBoxName.Text .Trim ();
			myRow["性别"]=comboBoxSex.Text .Trim ();
	
			//新建一个日期格式
			DateTime datetime ;
			int Year = Convert.ToInt32 (textBoxYear.Text);
			int Month = comboBoxMonth.SelectedIndex +1;
			int Day =comboBoxDay.SelectedIndex +1;
			datetime = new DateTime (Year,Month,Day);
			myRow["出生日期"]=datetime;
			myRow["生肖"] = textBoxBelong.Text .Trim ();
			myRow["星座"] = textBoxStar.Text .Trim ();
			myRow["电话"] = textBoxPhone.Text .Trim ();
			myRow["手机"] = textBoxMobile.Text .Trim ();
			myRow["Oicq"] = textBoxOicq.Text .Trim ();
			myRow["Email"]= textBoxMail.Text .Trim ();
			//图片字段的赋值
			if(pictureBox.Image !=null)
			{
				//新建一个内存流
				MemoryStream ms = new MemoryStream ();
				//把图片内容存到内存流中去
				pictureBox.Image .Save (ms,System.Drawing .Imaging.ImageFormat .Bmp );
				//把内存流中的内容按字节读入数组
				byte [] myData = new Byte [ms.Length ];
				ms.Position = 0;
				ms.Read (myData,0,Convert.ToInt32 (ms.Length ));
				myRow["图片"] = myData;
				ms.Close ();
			}
			//添加行
         	myDataSet.Tables ["Records"].Rows .Add (myRow);
			//设置状态条
			statusBarMain.Panels [0].Text = "当前用户:"+currentUser;
			statusBarMain.Panels [1].Text = "共有记录:"+myDataSet.Tables ["Records"].Rows .Count .ToString ();
			
			//更新数据库信息,保持DataSet与数据库一致
                           //注意此处出现异常!!!!!!!!!!!!!
			myDataAdapter.Update (myDataSet,"Records");
			buttonSaveNew.Enabled =false;
		}
各位请帮忙看看!!!!谢了