private void ResetDatabase()
{
using (TestEFDeployEntities db = new TestEFDeployEntities(connstr))
{
db.Database.ExecuteSqlCommand("truncate table TestTable");
db.SaveChanges();
TestTable tt1 = new TestTable();
tt1.DataValue = "this is record 1";
db.TestTables.Add(tt1);
db.SaveChanges();
TestTable tt2 = new TestTable();
tt2.DataValue = "this is record 2";
db.TestTables.Add(tt2);
db.SaveChanges();
TestTable tt3 = new TestTable();
tt3.DataValue = "this is record 3";
db.TestTables.Add(tt3);
db.SaveChanges();
LoadListbox();
lbIDs.SelectedIndex = 0;
}
}
private void LoadListbox()
{
// load up the pkid listbox
lbIDs.Items.Clear();
using (TestEFDeployEntities ctx = new TestEFDeployEntities(this.connstr))
{
var mypkids = (from rows in ctx.TestTables
select rows).ToList();
foreach (var row in mypkids)
{
lbIDs.Items.Add(row.pkid.ToString());
}
}
}
private void lbIDs_SelectedIndexChanged(object sender, EventArgs e)
{
int param = GetSelectedPKID();
// update data textbox with change in selected pkid
using (TestEFDeployEntities ctx = new TestEFDeployEntities(this.connstr))
{
var mypkids = (from rows in ctx.TestTables
where rows.pkid == param
select rows).ToList();
if (mypkids != null && mypkids.Count > 0)
{
txtData.Text = mypkids[0].DataValue;
}
}
}
private void btnSave_Click(object sender, EventArgs e)
{
// save changes to the data field to the currently selected pkid record
int param = GetSelectedPKID();
if (param > 0)
{
using (TestEFDeployEntities ctx = new TestEFDeployEntities(this.connstr))
{
TestTable savethis = (from rows in ctx.TestTables
where rows.pkid == param
select rows).FirstOrDefault();
savethis.DataValue = txtData.Text;
ctx.SaveChanges();
}
}
}
private void btnNew_Click(object sender, EventArgs e)
{
//create new testtable object
//save it, letting the identity 1, 1 get set
//reload listbox, go to appropriate index
//focus one data textbox
int myid = 0;
TestTable newtt = new TestTable();
//create the new record, get the pkid
using (TestEFDeployEntities db = new TestEFDeployEntities(connstr))
{
db.TestTables.Add(newtt);
db.SaveChanges();
myid = newtt.pkid;
}
//reload the listbox
LoadListbox();
}
