protected void CountAlbums_Click(object sender, EventArgs e)
{
//traversing a GridView display
//just like a list view, the only records available to us at this time out of the dataset assigned to the GridView are the rows being displayed.
//eg, I have 100 rows, out of all of those records, I am only deal with what I want to display.
//IF to deal with all records, No gridview, do Datasets!
//create a List<T> to hold the counts of the display
// need the using name space to access entity
List <ArtistAlbumCounts> Artists = new List <ArtistAlbumCounts>();
//reusable pointers to an instance of the specified class
ArtistAlbumCounts item = null;
int artistid = 0;
//setup the loop to traver the gridview
foreach (GridViewRow line in AlbumList.Rows)
{
//access the artistid
//use the select value instead of selected index because list can be sorted.
//The only time to use selected index is to determin if something has been selected.
artistid = int.Parse((line.FindControl("ArtistList") as DropDownList).SelectedValue);
//determine if you have already created a count instance in the list<T> for this artist.
//if Not, create a new instance fo the artist and set its count to 1.
//if ound, increment the count (+1)
//1. search for the art in list<T>
//x is the current record of the find opearation is looking at at that instance
//=> means for x, do the following:
//ArtistID from the list of T, compare to the artistid from the grid view.
//what will be returned is either null (not found) or the instance in the list<T>
item = Artists.Find(x => x.ArtistId == artistid);
if (item == null)
{
//Create instance, initialize, add it List<T>,
item = new ArtistAlbumCounts();
item.ArtistId = artistid;
item.AlbumCount = 1;
Artists.Add(item);
}
else
{
item.AlbumCount++;
}
}
//attach the List<T> (collection) to the display control
ArtistAlbumCountList.DataSource = Artists;
ArtistAlbumCountList.DataBind();
}
protected void CountAlbums_Click(object sender, EventArgs e)
{
//traversing a GridView display
//the only records available to us at this time
// out of the dataset assigned to the GridView
// are the row being display
//create a List<T> to hold the counts of the display
List <ArtistAlbumCounts> Artists = new List <ArtistAlbumCounts>();
//reusable pointer to an instance of the specified class
ArtistAlbumCounts item = null;
int artistid = 0;
//setup the loop to traverse the gridview
foreach (GridViewRow line in AlbumList.Rows)
{
//access the artistid
artistid = int.Parse((line.FindControl("ArtistList") as DropDownList).SelectedValue);
//determine if you have already created a count
// instance in the List<T> for this artist
//if NOT, create a new instance for the artist and
// set its count to 1
//if found, increment the counter (+1)
//search for artist in list<T>
//what will be return is either null (not found)
// or the instance in the List(T)
item = Artists.Find(x => x.ArtistId == artistid);
if (item == null)
{
//Create instance, initialize, add to List<T>
item = new ArtistAlbumCounts();
item.ArtistId = artistid;
item.AlbumCount = 1;
Artists.Add(item);
}
else
{
item.AlbumCount++;
}
}
//attach the List<T> (collection) to the display control
ArtistAlbumCountList.DataSource = Artists;
ArtistAlbumCountList.DataBind();
}
protected void CountAlbums_Click(object sender, EventArgs e)
{
//traversing a GridView display (counting artists in List<T> within GridView)
//the only records available to us at this time out of the data set assigned to the GridView are the rows being displayed (only counts page being shown)
//create a List<T> to hold the counts of the display
List <ArtistAlbumCounts> Artists = new List <ArtistAlbumCounts>();
//reusable pointer to an instance of the specified class
ArtistAlbumCounts item = null;
int artistId = 0;
//setup the loop to traverse the GridVIew
foreach (GridViewRow line in AlbumList.Rows)
{
//access the artist id
artistId = int.Parse((line.FindControl("ArtistList") as DropDownList).SelectedValue);
//determine if you have already created a count instance in the List<T> for this artist
//if NOT, create a new instance for the artist and set it's count to 1
//if Yes Increment the counter +1
//search for artist in List<T> what will be return will either be null (Not found) or the insance in the List<T>
item = Artists.Find(x => x.ArtistId == artistId);
if (item == null)
{
//Create Instance, Innitialize, add to list
item = new ArtistAlbumCounts();
item.ArtistId = artistId;
item.AlbumCount = 1;
Artists.Add(item);
}
else
{
item.AlbumCount++;
}
//Attach List<T> to the display control
ArtistAlbumCountList.DataSource = Artists;
ArtistAlbumCountList.DataBind();
}
}
protected void CountAlbums_Click(object sender, EventArgs e)
{
// Note: Only available records are the instances on the grids current page
List <ArtistAlbumCounts> ArtistList = new List <ArtistAlbumCounts>();
// Reusable pointer to the instance of the class
ArtistAlbumCounts item = null;
// Iterate through each grid row
int artistID = 0;
foreach (GridViewRow row in Albums.Rows)
{
// Current rows artist ID
artistID = int.Parse((row.FindControl("Artists") as DropDownList).SelectedValue);
// Check if the current item is already accounted for
item = ArtistList.Find(x => x.ArtistId == artistID);
// Result of check
if (item == null)
{
// Create instance and add it to the list
item = new ArtistAlbumCounts();
item.ArtistId = artistID;
item.AlbumCount = 1;
ArtistList.Add(item);
}
else
{
item.AlbumCount++;
}
}
// Attach the list to the display control
ArtistAlbumCountList.DataSource = ArtistList;
ArtistAlbumCountList.DataBind();
}