下拉列表会在选中时更改Gridview中的所有值，而不是特定行

Question

I have a DropDownList in a Gridview that allows you to start or stop services on remote servers. The DropDownList will allow you to start or stop services but it starts right from the first service in the list and loops through all of them. How can I get the DropDownList to only perform action on the service name for that specific row and not the entire Gridview? The services are added to a list that is binded to the GridView. Thanks.

    protected void ddlAction_SelectedIndexChanged(object sender, EventArgs e)
{
    ConnectionOptions options = new ConnectionOptions();
    options.Username = "myUsername";
    options.Password = "myPassword"; 
    options.EnablePrivileges = true;
    serverName.Text = "myServerName";

    if (txtbox2.Text != string.Empty)
    {
        //Create the scope that will connect to the default root for WMI
        var scope = new ManagementScope(string.Format(@"\\{0}\root\cimv2", serverName.Text), options);
        scope.Connect();

        //Create a path to the services with the default options
        ObjectGetOptions option = new ObjectGetOptions(null, TimeSpan.MaxValue, true);
        ManagementPath spoolerPath = new ManagementPath("Win32_Service");
        ManagementClass servicesManager = new ManagementClass(scope, spoolerPath, option);
        try
        {
            //Get all of the services running on this server
            using (ManagementObjectCollection services = servicesManager.GetInstances())
            {
                foreach (ManagementObject service in services)
                {
                    list.Add(new myServers() { Name = service["Name"].ToString(), State = service["State"].ToString(), Servers1 = serverName.Text });

                    GridViewRow gvr = ((DropDownList)sender).NamingContainer as GridViewRow;

                    if (gvr != null)
                    {
                        //We can find all the controls in this row and do operations on them
                        var ddlQuantity = gvr.FindControl("ddlAction") as DropDownList;
                        if (ddlQuantity != null)
                        {
                            if (ddlQuantity.SelectedValue != "-1")
                            {
                                if (ddlQuantity.SelectedValue == "1")
                                {
                                    service.InvokeMethod("StartService", null);
                                }
                                else if (ddlQuantity.SelectedValue == "2")
                                {
                                    service.InvokeMethod("StopService", null);
                                }
                            }
                        }
                    }
                }

            }
        }
        catch (UnauthorizedAccessException)

        {
            throw;
        }
        gvServer.DataSource = list;

        gvServer.DataBind();
    }
}

Answer 1

There is the SelectedIndex property for the GridView :

int i = yourGridView.SelectedIndex;

Then in your code remove foreach if you don't need it, and change your invoking lines to perform actions on i element:

services[i].InvokeMethod("StartService", null);

And to stop the service:

services[i].InvokeMethod("StopService", null);