Sie können die neue Zeile in die Datenquelle einfügen (z. B. eine DataTable). DataRowCollection hat eine Funktion InsertAt, mit der Sie Zeilen an der gewünschten Position einfügen können.
Ich werde ein einfaches Beispiel geben (in VB.Net mit einem Gridview, arbeitet Datagrid gleich):
ASPX:
<asp:GridView ID="MyGrid" runat="server" AutoGenerateColumns="true">
</asp:GridView>
<asp:Button ID="BtnInsert" runat="server" Text="insert Obama at Position" /><asp:TextBox ID="TxtPosition" Text="0" runat="server"></asp:TextBox>
Codebehind:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
BindData(getDataSource())
End If
End Sub
Private Function getDataSource() As DataTable
Dim tbl As New DataTable
Dim col As New DataColumn("ID", GetType(Int32))
tbl.Columns.Add(col)
col = New DataColumn("FirstName", GetType(String))
tbl.Columns.Add(col)
col = New DataColumn("LastName", GetType(String))
tbl.Columns.Add(col)
Dim row As DataRow = tbl.NewRow
row("ID") = 1
row("FirstName") = "Benjamin"
row("LastName") = "Franklin"
tbl.Rows.Add(row)
row = tbl.NewRow
row("ID") = 2
row("FirstName") = "Arnold"
row("LastName") = "Schwarzenegger"
tbl.Rows.Add(row)
row = tbl.NewRow
row("ID") = 3
row("FirstName") = "Albert"
row("LastName") = "Einstein"
tbl.Rows.Add(row)
row = tbl.NewRow
row("ID") = 4
row("FirstName") = "Bill"
row("LastName") = "Gates"
tbl.Rows.Add(row)
Return tbl
End Function
Private Sub BindData(ByVal source As DataTable)
Me.MyGrid.DataSource = source
Me.MyGrid.DataBind()
End Sub
Private Sub BtnInsert_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BtnInsert.Click
Dim pos As Int32 = 0
Int32.TryParse(TxtPosition.Text, pos)
Dim source As DataTable = Me.getDataSource()
If pos < 0 OrElse pos > source.Rows.Count Then pos = 0
Dim row As DataRow = source.NewRow
row("ID") = 5
row("FirstName") = "Barack"
row("LastName") = "Obama"
source.Rows.InsertAt(row, pos)'this is the only important'
BindData(source)
End Sub
Vielleicht etwas Code zeigen wie bist du verbindlich? –