ASPxTreeList.HtmlDataCellPrepared Event

Enables the settings of individual cells to be changed.

Namespace: DevExpress.Web.ASPxTreeList

Assembly: DevExpress.Web.ASPxTreeList.v19.2.dll

Declaration

public event TreeListHtmlDataCellEventHandler HtmlDataCellPrepared
Public Event HtmlDataCellPrepared As TreeListHtmlDataCellEventHandler

Event Data

The HtmlDataCellPrepared event handler receives an argument of the TreeListHtmlDataCellEventArgs type. The following properties provide information specific to this event.

Property Description
Cell Gets the processed data cell.
CellValue Gets the processed cell's value.
Column Gets the data column that owns the cell currently being processed.
Level Gets the nesting level of a node which contains the processed data cell.
NodeKey Gets the key value of a node which contains the processed cell.

Remarks

The HtmlDataCellPrepared event is raised for each data cell within the ASPxTreeList when the corresponding table cell has been created. You can handle this event to change the style settings of individual cells.

The processed cell is identified by the event parameter's TreeListHtmlDataCellEventArgs.Cell property. Its value is returned by the TreeListHtmlDataCellEventArgs.CellValue property. The column and node where the processed cell resides can be obtained via the TreeListHtmlDataCellEventArgs.Column and TreeListHtmlRowEventArgs.Row properties.

Examples

This example shows how to paint individual data cells and entire nodes depending upon the ASPxTreList's data. The ASPxTreeList.HtmlDataCellPrepared event is handled to custom paint budgets that are greater than $1,000,000.

The ASPxTreeList.HtmlRowPrepared event is handled to custom paint departments located at Monterey.

The image below shows the result:

exConditionalFormatting

using System.Drawing;

protected void treeList_HtmlRowPrepared(object sender, TreeListHtmlRowEventArgs e) {
    if(Object.Equals(e.GetValue("Location"), "Monterey"))
        e.Row.BackColor = Color.FromArgb(211, 235, 183);
}

protected void treeList_HtmlDataCellPrepared(object sender, TreeListHtmlDataCellEventArgs e) {
    if(e.Column.Name == "budget") {
        decimal value = (decimal)e.CellValue;
        e.Cell.BackColor = GetBudgetColor(value);
        if(value > 1000000M)
            e.Cell.Font.Bold = true;
    }
}
See Also