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我正在使用名为Students的数据库表的结果填充asp中的网格。学生表中列出了分数和分数可能。我需要根据积分/积分可能的百分比来计算字母等级。我在一个叫Grades的课上做这个。我如何获得当前学生的pointsEarned和pointsPossible的值,然后将计算出的letterGrade添加到网格中?如何在ASP中获取数据库记录时将自定义数据字段添加到GridView中?
这里是我的方法:
protected void Page_Load(object sender, EventArgs e)
{
string connstring;
connstring = ConfigurationManager.ConnectionStrings["dbConn"].ConnectionString;
SqlConnection conn = new SqlConnection(connstring);
SqlCommand cmd = new SqlCommand("GetStudents", conn);
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
conn.Open();
DataSet ds = new DataSet();
adapter.Fill(ds, "dbo.Students");
DataTable dt = new DataTable();
dt.Columns.Add("letterGrade", typeof(string));
Grades studentGrade = new Grades();
studentGrade.pointsEarned = ???;
studentGrade.pointsPossible = ???;
string studentLetterGrade = studentGrade.calculate();
//How do I add studentLetterGrade as the letterGrade column?
StudentGrid.DataSource = ds;
StudentGrid.DataBind();
conn.Close();
conn.Dispose();
}
这里是我的网格:
<asp:SqlDataSource ID="GetStudents" runat="server" ConnectionString="<%$ ConnectionStrings:dbConn %>" SelectCommand="dbo.GetStudents" SelectCommandType="StoredProcedure"></asp:SqlDataSource>
<asp:GridView ID="StudentGrid" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:CommandField ShowSelectButton="False" />
<asp:BoundField DataField="studentId" HeaderText="ID" />
<asp:BoundField DataField="firstName" HeaderText="First Name" />
<asp:BoundField DataField="lastName" HeaderText="Last Name" />
<asp:BoundField DataField="semester" HeaderText="Semester" />
<asp:BoundField DataField="semesterYear" HeaderText="Year" />
<asp:BoundField DataField="letterGrade" HeaderText="Grade" />
</Columns>
</asp:GridView>
是的,我可以计算查询中的百分比,但是我还需要根据在我的Grades类中完成的百分比(A,B,C,D,F)来计算字母等级。 – ShoeLace1291
@ ShoeLace1291 - 使用gridview rowdatabound事件,当数据行绑定到gridview控件中的数据时,将触发此事件,这将允许您在绑定到网格时修改数据..这将帮助您开始。 [msdn rowdatabound](https://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.rowdatabound(v = vs.110).aspx) – Roy
我该怎么做? – ShoeLace1291