Vb.net 添加行时重新绑定gridview会增加重新绑定已绑定行的开销
我有一个包含DropDownList的GridView,我在RowBoundEvent中用DB查询填充DDL 网格的其余列是边界字段,它们从(对象)列表中填充 每次我向GridView添加新行时,我都必须再次查询DB以查找以前填充的DDL,这是我想要避免的,有什么建议吗 编辑:添加代码Vb.net 添加行时重新绑定gridview会增加重新绑定已绑定行的开销,vb.net,gridview,rowdatabound,Vb.net,Gridview,Rowdatabound,我有一个包含DropDownList的GridView,我在RowBoundEvent中用DB查询填充DDL 网格的其余列是边界字段,它们从(对象)列表中填充 每次我向GridView添加新行时,我都必须再次查询DB以查找以前填充的DDL,这是我想要避免的,有什么建议吗 编辑:添加代码 <asp:BoundField DataField="getUserName" HeaderText="Name" /> <asp:BoundField DataField="getUser
<asp:BoundField DataField="getUserName" HeaderText="Name" />
<asp:BoundField DataField="getUserId" HeaderText="User ID" />
<asp:TemplateField>
<ItemTemplate>
<asp:DropDownList ID="ddlRoles" runat="server" >
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
Grid_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles addUsersGrid.RowDataBound
Dim ddl As DropDownList = TryCast(e.Row.FindControl("ddlRoles"), DropDownList)
If ddl IsNot Nothing Then
Dim sSQL As String = "SELECT ..."
Dim rolesAdapter As OdbcDataAdapter = New OdbcDataAdapter(sSQL, ADOCon)
rolesAdapter.Fill(dt)
For Each dr As DataRow In dt.Rows
ddl.Items.Add(dr("NAME").ToString())
ddl.Items(iInt).Value = dr("ID").ToString
iInt += 1
Next
end if
Grid_RowDataBound(ByVal sender作为对象,ByVal e作为System.Web.UI.WebControl.GridViewRowEventArgs)处理addUsersGrid.RowDataBound
Dim ddl As DropDownList=TryCast(例如,Row.FindControl(“ddl角色”),DropDownList)
如果ddl不是什么,那么
将sSQL设置为字符串=“选择…”
作为OdbcDataAdapter的Dim角色适配器=新的OdbcDataAdapter(sSQL、ADOCon)
角色自适应填充(dt)
对于dt.行中的每个dr As数据行
ddl.Items.Add(dr(“NAME”).ToString())
ddl.Items(iInt).Value=dr(“ID”).ToString
iInt+=1
下一个
如果结束
我想这是相关的代码。有代码可以分享吗?“这样我们就可以了解你的情况了?”AltafSami在编辑中添加了代码。