//----------------------------- Local Events --------------------------------------//
//Build the grid
protected override int CreateChildControls(IEnumerable dataSource, bool dataBinding)
{
//The IStateManager is not used, therefor the grid has to be
//build again in case of a PostBack (therefor the dataBinding property
//is not checked)
//Disbale viewstate, otherwise the datasource/binding is lost after a
//postback and I have not implemented the viewstate (alle element are lost)
this.EnableViewState = false;
int count = 0; //Count the controls (return value)
if (dataSource == null)
{
//No records found
Label lb = new Label();
lb.Text = _noRecordsText;
if (_emptyGridCssClass != null) lb.CssClass = _emptyGridCssClass;
Controls.Add(lb);
count++;
}
else
{
//Records were found, build the grid
Table tb = new Table();
tb.CellPadding = 0;
tb.CellSpacing = 0;
if (_cssClass != null) tb.CssClass = CssClass;
//Build header -----------------------------------------------------------
TableHeaderRow thr = new TableHeaderRow();
thr.TableSection = TableRowSection.TableHeader;
TableHeaderCell thc;
foreach (GridField gf in _gridFields)
{
//A header cell for each field
thc = new TableHeaderCell();
if (gf.CssClass != null) thc.CssClass = gf.CssClass;
thc.Attributes["scope"] = "col";
if (gf.HeaderText != null) thc.Text = gf.HeaderText;
thr.Cells.Add(thc);
}
//Special columns
if (_showDeleteColumn)
{
thc = new TableHeaderCell();
thc.Text = "Delete";
thc.Style["text-align"] = "center";
thr.Cells.Add(thc);
}
if (_showEditColumn)
{
thc = new TableHeaderCell();
thc.Text = "Edit";
thc.Style["text-align"] = "center";
thr.Cells.Add(thc);
}
if (_showOrderColumn)
{
thc = new TableHeaderCell();
thc.Text = "Order";
thc.Style["text-align"] = "center";
thr.Cells.Add(thc);
}
tb.Rows.Add(thr);
//Body -----------------------------------------------------------------------
TableRow tr;
TableCell tc;
Image img;
string rowData = "";
string rowCancel = ""; //cancel row action (delete)
//Build each new row in WITGridRow (instead of directly adding it
//to the table's row). Trigger the event RowDataBound to enable
//the programmer to change or read the information before the grid is build.
//Then build the grid.
int row = 0;
foreach (DataRowView dataitem in dataSource)
{
//New custom row for RowDataBound-event
WITGridRow wgr = new WITGridRow(dataitem, row);
//Build per (data)row
tr = new TableRow();
tr.TableSection = TableRowSection.TableBody;
if (_highLightSelectedRow)
{
tr.Attributes["onmouseover"] = "this.className='" + _highlightCssClass + "';";
tr.Attributes["onmouseout"] = "this.className=''";
rowData = "row_" + row.ToString();
if (_dataKeyName != "") rowData += "_" + dataitem[_dataKeyName].ToString();
tr.Attributes["onclick"] = "javascript:" + this.Page.ClientScript.GetPostBackEventReference(this, rowData);
}
//Regular items
foreach (GridField gf in _gridFields)
{
//Build per column (data field)
tc = new TableCell();
count++;
tc.CssClass = gf.CssClass;
if (gf is CheckBoxField) //Put checkbox before bound because checkbox is bound
{
CheckBoxField cbf = (CheckBoxField)gf;
if (cbf.DataField == null) throw (new NullReferenceException("The data field for '" + cbf.ID + "' is not defined."));
CheckBox cb = new CheckBox();
cb.Enabled = false;
cb.Checked = Convert.ToBoolean(((DataRowView)dataitem).Row[cbf.DataField]);
cb.CssClass = _checkboxCssClass;
cb.ID = cbf.ID;
cb.Text = "";
tc.Style["text-align"] = "center";
tb.EnableViewState = false;
tc.Controls.Add(cb);
}
else if (gf is BoundField)
{
BoundField bf = (BoundField)gf;
if (bf.DataField == null) throw (new NullReferenceException("The data field for '" + bf.ID + "' is not defined."));
tc.ID = gf.ID;
tc.Text = ((DataRowView)dataitem).Row[bf.DataField].ToString();
}
wgr.Cells.Add(tc);
}
//Special columns
if (_showDeleteColumn)
{
tc = new TableCell();
count++;
tc.Width = 50;
tc.Style["text-align"] = "center";
img = new Image();
img.ImageUrl = this.Page.ClientScript.GetWebResourceUrl(this.GetType(), "BCC.Controls.CollectionGrid.Resources.delete.gif");
rowData = "delete_" + row.ToString();
rowCancel = "cancel_" + row.ToString(); //to avoid a row click when the user cancels the delete
if (_dataKeyName != "") rowData += "_" + dataitem[_dataKeyName].ToString();
img.Attributes["onclick"] = "javascript:if (confirm('" + _confirmDeleteText + "')) { " + this.Page.ClientScript.GetPostBackEventReference(this, rowData) + " } " +
" else " + this.Page.ClientScript.GetPostBackEventReference(this, rowCancel);
tc.Controls.Add(img);
wgr.Cells.Add(tc);
}
if (_showEditColumn)
{
tc = new TableCell();
count++;
tc.Width = 30;
tc.Style["text-align"] = "center";
img = new Image();
img.ImageUrl = this.Page.ClientScript.GetWebResourceUrl(this.GetType(), "BCC.Controls.CollectionGrid.Resources.pencil.gif");
rowData = "edit_" + row.ToString();
if (_dataKeyName != "") rowData += "_" + dataitem[_dataKeyName].ToString();
img.Attributes["onclick"] = "javascript:" + this.Page.ClientScript.GetPostBackEventReference(this, rowData);
tc.Controls.Add(img);
wgr.Cells.Add(tc);
}
if (_showOrderColumn)
{
//Up
tc = new TableCell();
count++;
tc.Width = 60;
tc.Style["text-align"] = "center";
img = new Image();
img.ImageUrl = this.Page.ClientScript.GetWebResourceUrl(this.GetType(), "BCC.Controls.CollectionGrid.Resources.up.gif");
rowData = "up_" + row.ToString();
if (_dataKeyName != "") rowData += "_" + dataitem[_dataKeyName].ToString();
img.Attributes["onclick"] = "javascript:" + this.Page.ClientScript.GetPostBackEventReference(this, rowData);
tc.Controls.Add(img);
wgr.Cells.Add(tc);
//Down
img = new Image();
img.ImageUrl = this.Page.ClientScript.GetWebResourceUrl(this.GetType(), "BCC.Controls.CollectionGrid.Resources.down.gif");
rowData = "down_" + row.ToString();
if (_dataKeyName != "") rowData += "_" + dataitem[_dataKeyName].ToString();
img.Attributes["onclick"] = "javascript:" + this.Page.ClientScript.GetPostBackEventReference(this, rowData);
tc.Controls.Add(img);
wgr.Cells.Add(tc);
}
//Trigger OnRowDataBound
if (RowDataBound != null)
{
//RowDataBound(this, new GridViewRowEventArgs(gvr));
RowDataBound(this, new WITGridRowEventArgs(wgr));
}
//Add the (changed) information to the table.
while (wgr.Cells.Count > 0)
{
//Adding the cell will empty the cell collection
tr.Cells.Add(wgr.Cells[0]);
}
tb.Rows.Add(tr);
row++;
}
Controls.Add(tb);
}
return count;
}
//Constructor
public WITGridRowEventArgs(WITGridRow row)
{
_row = row;
}