private void btnClass_Save_Click(object sender, EventArgs e)
{
ESPClass cls = new ESPClass(txtClassName.Text, txtClassTitle.Text);
if (Mode == EditorMode.Edit)
{
cls.Id = long.Parse(txtClassId.Text);
}
if (!ValidateClass(cls))
{
txtClassName.Focus();
return;
}
if (!SaveClass(cls))
{
return;
}
MessageBox.Show("Saved!", "Class information", MessageBoxButtons.OK, MessageBoxIcon.Information);
Mode = EditorMode.None;
btnClass_Save.Enabled = false;
txtClassName.ReadOnly = (Mode == EditorMode.None);
txtClassTitle.ReadOnly = (Mode == EditorMode.None);
LoadClasses();
btnClass_New.Focus();
}
private void lbClasses_SelectedIndexChanged(object sender, EventArgs e)
{
Mode = EditorMode.None;
btnClass_Save.Enabled = false;
txtClassName.Text = string.Empty;
txtClassTitle.Text = string.Empty;
txtClassId.Text = "0";
txtClassName.ReadOnly = (Mode == EditorMode.None);
txtClassTitle.ReadOnly = (Mode == EditorMode.None);
if (null == lbClasses.SelectedItem)
{
return;
}
ESPClass selCat = lbClasses.SelectedItem as ESPClass;
if (selCat == null)
{
return;
}
txtClassId.Text = selCat.Id.ToString();
txtClassName.Text = selCat.Name;
txtClassTitle.Text = selCat.Title;
}
private bool DeleteClass(ESPClass cls)
{
if (null == cls)
{
return(false);
}
try
{
var curClses = DB.ChangeTracker.Entries <ESPClass>();
var curCls = curClses.Where(e => e.Entity.Id == cls.Id).Select(e => e.Entity).FirstOrDefault();
if (null != curCls)
{
DB.Classes.Remove(curCls);
DB.SaveChanges();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return(false);
}
return(true);
}
private bool SaveClass(ESPClass cls)
{
try
{
if (Mode == EditorMode.AddNew)
{
DB.Classes.Add(cls);
}
else
{
var curClses = DB.ChangeTracker.Entries <ESPClass>();
var curCls = curClses.Where(e => e.Entity.Id == cls.Id).Select(e => e.Entity).FirstOrDefault();
if (null != curCls)
{
curCls.Name = curCls.Name;
curCls.Title = curCls.Title;
}
}
DB.SaveChanges();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return(false);
}
return(true);
}
private bool ValidateClass(ESPClass cls)
{
if ((cls == null) || (cls.Name == string.Empty) || cls.Title == string.Empty)
{
MessageBox.Show("Invalid information.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return(false);
}
if (Mode == EditorMode.AddNew)
{
var Classes = DB.Classes.Where(e => e.Name == cls.Name || e.Title == cls.Title).FirstOrDefault();
if (null != Classes)
{
MessageBox.Show("Already exist.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return(false);
}
}
return(true);
}
private void lbClasses_KeyDown(object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.Delete:
{
if (null == lbClasses.SelectedItems)
{
return;
}
bool bChanged = false;
foreach (var obj in lbClasses.SelectedItems)
{
ESPClass cls = obj as ESPClass;
if (DeleteClass(cls))
{
bChanged = true;
}
}
if (!bChanged)
{
return;
}
Mode = EditorMode.None;
btnClass_Save.Enabled = false;
txtClassName.ReadOnly = (Mode == EditorMode.None);
txtClassTitle.ReadOnly = (Mode == EditorMode.None);
LoadClasses();
}
break;
default:
break;
}
}
