GridViewDataImageColumn Class

A data column that displays images located at the specified URLs.

Assembly: DevExpress.Web.v23.2.dll

Declaration

C#
VB.NET

public class GridViewDataImageColumn :
    GridViewEditDataColumn

Public Class GridViewDataImageColumn
    Inherits GridViewEditDataColumn

Remarks

In the GridViewDataImageColumn, images are obtained from URLs contained in the bound data field. Use the PropertiesImage property to access and customize the column editor’s settings.

Images rendered in the GridViewDataImageColumn column are not exported. Handle the ExportRenderBrick event and assign the image to the ImageValue property to implement image export. Note that the ExportRenderBrick event does not fire in DataAware export mode, so you should set the export mode to WYSIWIG.

Run Demo: Export with Data Cell Bands View Example: ASPxGridView - Export images from the column of the GridViewDataImageColumn type

ASPX

<dx:ASPxGridView ID="grid" runat="server" AutoGenerateColumns="False" DataSourceID="XmlDataSource1" 
    OnExportRenderBrick="grid_ExportRenderBrick">
    <Columns>
        <dx:GridViewDataTextColumn FieldName="Common_Name" Caption="Common name" />
        <dx:GridViewDataTextColumn FieldName="Species_Name" Caption="Species name" />
        <dx:GridViewDataImageColumn FieldName="ImagePath" Caption="Image">
            <PropertiesImage>
                <ExportImageSettings Width="180" Height="120" />
            </PropertiesImage>
        </dx:GridViewDataImageColumn>
    </Columns>
    <%--...--%>
</dx:ASPxGridView>

C#
VB.NET

byte[] GetImageBinaryData(string relativePath) {
    string path = Server.MapPath(relativePath);
    return File.Exists(path) ? File.ReadAllBytes(path) : null;
}

protected void grid_ExportRenderBrick(object sender, ASPxGridViewExportRenderingEventArgs e) {
    var dataColumn = e.Column as GridViewDataColumn;
    if (dataColumn != null && dataColumn.FieldName == "ImagePath" && e.RowType == GridViewRowType.Data)
        e.ImageValue = GetImageBinaryData(e.Value.ToString());
}

Private Function GetImageBinaryData(ByVal relativePath As String) As Byte()
    Dim path As String = Server.MapPath(relativePath)
    Return If(File.Exists(path), File.ReadAllBytes(path), Nothing)
End Function

Protected Sub grid_ExportRenderBrick(ByVal sender As Object, ByVal e As ASPxGridViewExportRenderingEventArgs)
    Dim dataColumn = TryCast(e.Column, GridViewDataColumn)
    If dataColumn IsNot Nothing AndAlso dataColumn.FieldName = "ImagePath" AndAlso e.RowType = GridViewRowType.Data Then e.ImageValue = GetImageBinaryData(e.Value.ToString())
End Sub