private void btnSystem_Save_Click(object sender, EventArgs e)
{
ESPSystem system = new ESPSystem(txtSystem_Name.Text, long.Parse(txtSystem_Version.Text), txtSystem_Desc.Text, txtSystem_PIN.Text, int.Parse(txtSystem_Date.Text));
if (!ValidateSystem(system))
{
txtSystem_Name.Focus();
return;
}
if (!SaveSystem(system))
{
return;
}
MessageBox.Show("Saved!", "System information", MessageBoxButtons.OK, MessageBoxIcon.Information);
Mode = EditorMode.None;
btnSystem_Save.Enabled = false;
txtSystem_Name.ReadOnly = (Mode == EditorMode.None);
txtSystem_Version.ReadOnly = (Mode == EditorMode.None);
txtSystem_Desc.ReadOnly = (Mode == EditorMode.None);
txtSystem_PIN.ReadOnly = (Mode == EditorMode.None);
txtSystem_Date.ReadOnly = (Mode == EditorMode.None);
LoadSystem();
btnSystem_New.Enabled = lvwSystem.Items.Count == 0;
btnSystem_New.Focus();
}
private bool DeleteSystem(ESPSystem system)
{
if (null == system)
{
return(false);
}
try
{
var curSystems = DB.ChangeTracker.Entries <ESPSystem>();
var curSystem = curSystems.Where(e => e.Entity.Name == system.Name).Select(e => e.Entity).FirstOrDefault();
if (null != curSystem)
{
DB.System.Remove(curSystem);
DB.SaveChanges();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return(false);
}
return(true);
}
private bool SaveSystem(ESPSystem system)
{
try
{
if (Mode == EditorMode.AddNew)
{
DB.System.Add(system);
}
else
{
var curSystems = DB.ChangeTracker.Entries <ESPSystem>();
var curSystem = curSystems.Where(e => e.Entity.Name == system.Name).Select(e => e.Entity).FirstOrDefault();
if (null != curSystem)
{
curSystem.Name = system.Name;
curSystem.Version = system.Version;
curSystem.Description = system.Description;
curSystem.PIN = system.PIN;
}
}
DB.SaveChanges();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return(false);
}
return(true);
}
private void lvwSystem_SelectedIndexChanged(object sender, EventArgs e)
{
Mode = EditorMode.None;
txtSystem_Name.Text = string.Empty;
txtSystem_Version.Text = string.Empty;
txtSystem_Desc.Text = string.Empty;
txtSystem_PIN.Text = string.Empty;
txtSystem_Date.Text = string.Empty;
txtSystem_Name.ReadOnly = (Mode == EditorMode.None);
txtSystem_Version.ReadOnly = (Mode == EditorMode.None);
txtSystem_Desc.ReadOnly = (Mode == EditorMode.None);
txtSystem_PIN.ReadOnly = (Mode == EditorMode.None);
txtSystem_Date.ReadOnly = (Mode == EditorMode.None);
btnSystem_Save.Enabled = false;
if (lvwSystem.SelectedItems.Count <= 0)
{
return;
}
ListViewItem selItem = lvwSystem.SelectedItems[0];
if (null == selItem)
{
return;
}
ESPSystem system = selItem.Tag as ESPSystem;
if (null == system)
{
return;
}
txtSystem_Name.Text = system.Name;
txtSystem_Version.Text = system.Version.ToString();
txtSystem_Desc.Text = system.Description;
txtSystem_PIN.Text = system.PIN;
txtSystem_Date.Text = system.Date.ToString();
}
private void lvwSystem_DoubleClick(object sender, EventArgs e)
{
if (lvwSystem.SelectedItems.Count <= 0)
{
return;
}
ListViewItem selItem = lvwSystem.SelectedItems[0];
if (null == selItem)
{
return;
}
ESPSystem system = selItem.Tag as ESPSystem;
if (null == system)
{
return;
}
Mode = EditorMode.Edit;
txtSystem_Name.ReadOnly = true;
txtSystem_Version.ReadOnly = (Mode == EditorMode.None);
txtSystem_Desc.ReadOnly = (Mode == EditorMode.None);
txtSystem_PIN.ReadOnly = (Mode == EditorMode.None);
txtSystem_Date.ReadOnly = (Mode == EditorMode.None);
txtSystem_Name.Text = system.Name;
txtSystem_Version.Text = system.Version.ToString();
txtSystem_Desc.Text = system.Description;
txtSystem_PIN.Text = system.PIN;
txtSystem_Date.Text = system.Date.ToString();
txtSystem_Name.Focus();
}
private bool ValidateSystem(ESPSystem system)
{
return(system != null && system.Name != string.Empty);
}
