private void dataGridView1_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
// sorting is handle by this event handler
string strSortCol = this.dataGridView1.Columns[e.ColumnIndex].Name;
if (strPrevSortCol.Trim().ToUpper() != strSortCol.Trim().ToUpper())
{
this.dataGridView1.Columns[strPrevSortCol].HeaderCell.SortGlyphDirection = System.Windows.Forms.SortOrder.None;
strPrevSortCol = strSortCol;
strSortOrder = "ASC";
}
if (this.dataGridView1.Columns[e.ColumnIndex].HeaderCell.SortGlyphDirection == System.Windows.Forms.SortOrder.Ascending)
{
this.dataGridView1.Columns[e.ColumnIndex].HeaderCell.SortGlyphDirection = System.Windows.Forms.SortOrder.Descending;
strSortOrder = "DESC";
}
else if (this.dataGridView1.Columns[e.ColumnIndex].HeaderCell.SortGlyphDirection == System.Windows.Forms.SortOrder.Descending)
{
this.dataGridView1.Columns[e.ColumnIndex].HeaderCell.SortGlyphDirection = System.Windows.Forms.SortOrder.Ascending;
strSortOrder = "ASC";
}
else
{
if (strSortOrder == "ASC")
this.dataGridView1.Columns[strSortCol].HeaderCell.SortGlyphDirection = System.Windows.Forms.SortOrder.Ascending;
else
this.dataGridView1.Columns[strSortCol].HeaderCell.SortGlyphDirection = System.Windows.Forms.SortOrder.Descending;
}
dataGridView1.Rows.Clear();
DataRetriever retriever = new DataRetriever(connectionString, table, strSortCol + " " + strSortOrder);
memoryCache = new Cache(retriever, Page_Size);
this.dataGridView1.RowCount = retriever.RowCount;
dataGridView1.Refresh();
}
private void LoadData(string strSortCol, string strSortOrder)
{
// this function will load data into data table
dataGridView1.Rows.Clear();
dataGridView1.Refresh();
dataGridView1.Columns.Clear();
dataGridView1.DataSource = null;
try
{
DataRetriever retriever = new DataRetriever(connectionString, table, strSortCol + " " + strSortOrder);
memoryCache = new Cache(retriever, Page_Size);
//foreach (DataColumn column in retriever.Columns)
//{
// dataGridView1.Columns.Add(column.ColumnName, column.ColumnName);
//}
retriever.Columns.Cast<DataColumn>().ToList().ForEach(n => dataGridView1.Columns.Add(n.ColumnName, n.ColumnName));
this.dataGridView1.RowCount = retriever.RowCount;
}
catch (Exception ex)
{
MessageBox.Show("Connection could not be established. " + "Verify that the connection string is valid.");
Application.Exit();
}
// Adjust the column widths based on the displayed values.
this.dataGridView1.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.DisplayedCells);
// set the sorting glyph initially when data load
if (strSortOrder == "ASC")
{
this.dataGridView1.Columns[strSortCol].HeaderCell.SortGlyphDirection = System.Windows.Forms.SortOrder.Ascending;
}
else
{
this.dataGridView1.Columns[strSortCol].HeaderCell.SortGlyphDirection = System.Windows.Forms.SortOrder.Descending;
}
}