Se agregó un label del total de importe

Bancos/DepositosCaja.aspx

@@ -110,14 +110,17 @@
 
             <br />
             <br />
-
+            <div runat="server" id="divLabelTotal" style="width:100%;text-align:right;font-size:1.5em" visible="false">
+                <asp:label runat="server">Importe seleccionado: $</asp:label><asp:label runat="server" ID="lblValorTotal">00.00</asp:label>
+            </div>
+            <br />
             <asp:GridView ID="GvFacturas" runat="server" AutoGenerateColumns="False" DataKeyNames="CveVenta, CvePrePoliza, CveIE, TipoCambio, CveMoneda, CveCliente, IdCtaContableBancos, IdCtaContClientes, Importe" CssClass="table detallerow  table-hover" Style="text-align: center; float: right; width: 100%; font-size: medium;" GridLines="None">
                 <Columns>
                     <asp:TemplateField>
                         <HeaderTemplate>
                         </HeaderTemplate>
                         <ItemTemplate>
-                            <asp:CheckBox ID="ChkFactura" runat="server" Checked="false" Enabled="True" />
+                            <asp:CheckBox ID="ChkFactura" OnCheckedChanged="ChkFactura_Click" runat="server" Checked="false" Enabled="True" AutoPostBack="True"/>
                         </ItemTemplate>
                     </asp:TemplateField>
                     <asp:TemplateField HeaderText="Factura">

Bancos/DepositosCaja.aspx.vb

@@ -48,6 +48,7 @@ Partial Class Bancos_DepositosCaja
 
         UpGvFacturas.Update()
         GvFacturas.DataBind()
+        divLabelTotal.Visible = True
     End Sub
 
     Private Sub BtnDepositar_Click(sender As Object, e As EventArgs) Handles BtnDepositar.Click
@@ -157,4 +158,20 @@ Partial Class Bancos_DepositosCaja
         ObjContabilidad.Dispose()
     End Sub
 
+    Private Sub ObtenerTotalImporta()
+
+        Dim Total As Double = 0
+        For Each Gvr As GridViewRow In GvFacturas.Rows
+            If Gvr.FCCheckBox("ChkFactura").Checked Then
+                Total += Gvr.DataKey("Importe").ToDouble
+            End If
+        Next
+        lblValorTotal.Text = Total.ToString
+        UpGvFacturas.Update()
+    End Sub
+
+    Public Sub ChkFactura_Click(sender As Object, e As EventArgs)
+        ObtenerTotalImporta()
+    End Sub
+
 End Class