ASP.net GridView和数据源对象
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12-09-2019 - |
题
如何配置ASP.NET的GridView由一个DataSource对象,其中对象的方法需要一个noticeCode由C#代码通过填充它?
StudentControlPanel.aspx.cs
protected void Page_Load(object sender, EventArgs e)
{
string username = (string)Request.QueryString["username"];
Student std = Student.GetStudentByUsername(username);
if (std != null)
{
labName.Text = std.StudentName;
labUsername.Text = username;
labRollNo.Text = std.RollNo;
labRegNo.Text = std.RegNo;
Dept dpt = std.Department;
if (dpt != null)
{
labDepartment.Text = dpt.DeptName;
}
else
{
labDepartment.Text = "?";
}
}
/* Student-class has a SessionCode-property */
/* I need to pass this to Notice.GetNoticesBySessionCode()...*/
}
Notice.cs
public class Notice
{
public static List<Notice> GetNoticesBySessionCode(string sessionCode)
{
List<Notice> notices = null;
/* EcecuteReader()..... */
return notices;
}
}
解决方案
您将不得不std.SessionCode
的值绑定到在代码隐藏将ObjectDataSource。在上面的“配置数据源”屏幕上,选择无现在。你会动态地结合了。
如果您的ObjectDataSource是这样的:
<asp:ObjectDataSource ID="myObjDS" runat="server"
TypeName="YourNamespace.Notice"
SelectMethod="GetNoticesBySessionCode">
<SelectParameters>
<asp:Parameter Name="sessionCode" Type="String"/>
</SelectParameters>
</asp:ObjectDataSource>
然后
if (std != null)
{
//all the other code you have above.
myObjDS.SelectParameters["sessionCode"].DefaultValue = std.SessionCode;
myObjDS.DataBind(); //ensure you actually need this, may cause a double roundtrip to your DB.
}
其他提示
以上回答有它几乎很好地覆盖。我想补充,你还可以在ObjectDataSource控件的onselecting事件添加参数。
HTTP:// MSDN .microsoft.com / EN-US /库/ system.web.ui.webcontrols.objectdatasource.selecting.aspx
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