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Obtener opción seleccionada de GridView

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Como podemos obtener la selección del GridView, debemos declarar DataKeyName

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  1. VISTA DISEÑO
  2.  
  3. <asp:GridView runat="server" ID="GvVentas" DataKeyNames="ID" OnRowUpdating="GvVentas_RowUpdating"
  4.             OnSelectedIndexChanging ="GvVentas_SelectedIndexChanging" OnRowEditing ="GvVentas_RowEditing" AutoGenerateColumns="False" OnRowCancelingEdit="GvVentas_RowCancelingEdit">
  5.  
  6.             <Columns>
  7.             <asp:CommandField HeaderText="Edit-Update" ShowEditButton="True" />
  8.             <asp:BoundField DataField="ID" HeaderText="ID" ReadOnly="true" />
  9.               <asp:BoundField DataField="TIE" HeaderText="TIE" ReadOnly="true"/>
  10.                 <asp:BoundField DataField="CREDITO" HeaderText="CREDITO" ReadOnly="true" />
  11.                   <asp:BoundField DataField="CONTADO" HeaderText="CONTADO" ReadOnly="true" />
  12.                     <asp:BoundField DataField="TOTAL" HeaderText="TOTAL" ReadOnly="true" />
  13.  
  14.                      <asp:TemplateField HeaderText="FCH" SortExpression="FCH">
  15.                 <ItemTemplate>
  16.                         <asp:Label ID="LBFch" runat="server" Text='<%# Bind("FCH") %>'></asp:Label>
  17.                     </ItemTemplate>
  18.                     <EditItemTemplate>
  19.                         <asp:TextBox ID="TXTFch" runat="server" Text='<%# Bind("FCH") %>'></asp:TextBox>
  20.                     </EditItemTemplate>
  21.                 </asp:TemplateField>
  22.  
  23.  
  24.  
  25.             </Columns>
  26.             <RowStyle BackColor="#E3EAEB" />          
  27.         </asp:GridView>
  28.  
  29.  
  30. -------- CODIGO SERVIDOR -------
  31.  
  32.  'Opcion Seleccionada
  33.     Protected Sub GvVentas_SelectedIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewSelectEventArgs) Handles GvVentas.SelectedIndexChanging
  34.         Dim editID As Integer
  35.         editID = Convert.ToInt32(GvVentas.DataKeys(e.NewSelectedIndex).Value)
  36.     End Sub

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