GridView的几个操作

*//Hide 'StuID' cloumn
    protected void gvGrade_RowCreated(object sender, GridViewRowEventArgs e)
    {
        e.Row.Cells[2].Visible = false;
        //if gvGrade.AutoPaging=true It's something wrong.....
    }

     protected   void  gvGrade_RowEditing( object  sender, GridViewEditEventArgs e)
     ... {
        gvGrade.EditIndex = e.NewEditIndex;
        gvGrade.DataSource = CreateDataSource();
        gvGrade.DataBind();
    }

     protected   void  gvGrade_RowUpdating( object  sender, GridViewUpdateEventArgs e)
     ... {       

        OleDbConnection updateConn = new OleDbConnection(connString);
        updateConn.Open();

        In VS2005 It's very difficult to fetch the content of Hidden Column , so Fetch it from DataSet#region In VS2005 It's very difficult to fetch the content of Hidden Column , so Fetch it from DataSet
        
        string idSql = "SELECT distinct StuID FROM Grade where Department = '" + ddDepart.SelectedItem.Value.ToString() + "'";
        OleDbDataAdapter idAdapter = new OleDbDataAdapter(idSql, updateConn);
        DataSet idDs = new DataSet();
        idAdapter.Fill(idDs, "id");

        #endregion

        Calculate "colCount" because in "Page_Load" has "if(!IsPostBack)#region Calculate "colCount" because in "Page_Load" has "if(!IsPostBack)

        string calcSql = "SELECT COUNT(CourseName) FROM Course where Department = '"
                   + ddDepart.SelectedItem.Value.ToString() + "'";
        OleDbCommand calcCmd = new OleDbCommand(calcSql, updateConn);
        int colCount = (int)calcCmd.ExecuteScalar();

        #endregion

        Define a arraylist to save "CourseName"#region Define a arraylist to save "CourseName"

        ArrayList tempAl = new ArrayList();
        for (int i = 3; i < colCount+3; i++)
        ...{
            tempAl.Add(gvGrade.HeaderRow.Cells[i].Text);
        }

        #endregion

        Execute Update#region Execute Update
        
        for (int j = 0; j < colCount; j++)
        ...{
            //get the data from "TextBox"
            string getScore = ((TextBox)(gvGrade.Rows[e.RowIndex].Cells[j+3].Controls[0])).Text.Trim();
            if (getScore == "")
            ...{
                Response.Write("<script language='javascript'>alert('分数不可为空！');</script>");
                break;
            }
            else
            ...{
                string updateSql = "update Grade set Score=" + Int32.Parse(getScore)
                                    + " where StuID=" + idDs.Tables[0].Rows[e.RowIndex][0]
                                    + " and Course= " + "'" + (string)tempAl[j] + "'";

                OleDbCommand updateCmd = new OleDbCommand(updateSql, updateConn);
                updateCmd.ExecuteNonQuery();
            }
        }

        #endregion

        updateConn.Close();
    }

 *显示不及格分数：(使用了“清清月儿”的办法http://blog.youkuaiyun.com/21aspnet/　十分感谢！)

  protected   void  bnShowFail_Click( object  sender, EventArgs e)
     ... {
        for (int i = 0; i < gvGrade.Rows.Count; i++)
        ...{
            for (int j = 1; j < gvGrade.Rows[i].Cells.Count; j++)
            ...{
                string score = gvGrade.Rows[i].Cells[j].Text.Trim();
                if (!System.Text.RegularExpressions.Regex.IsMatch(score, @"^[0-9]+$"))
                    continue;

                if (Convert.ToDouble(score) < 60)
                ...{
                    //If < 60 change bgcolor for the cell & ID
                    gvGrade.Rows[i].Cells[j].BackColor = System.Drawing.Color.Red;
                    gvGrade.Rows[i].Cells[0].BackColor = System.Drawing.Color.Red;
                }
            }
        }

*点击学号显示学生详细信息（超链接列）　//学会用Eval了,^_^

admin.aspx:

<asp:CommandField CancelText="取消" DeleteText="删除" EditText="编辑" ShowEditButton="True"
                    UpdateText="确定" >
                    <ItemStyle Width="80px" />
                    <ControlStyle Width="80px" />
                </asp:CommandField>
                <asp:TemplateField HeaderText="学号">
                      <ItemTemplate>
                 <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl=<%#"./StuInfo.aspx?StuId="+Eval("学号") %>     
                                                     Text='<%# Eval("学号") %>'></asp:HyperLink>                                                    
                       </ItemTemplate>
                </asp:TemplateField>