ASPxBinaryImage.ContentBytes Property

Gets or sets an array of the bytes representing the image.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v24.2.dll

Declaration

C#

[DefaultValue(null)]
public virtual byte[] ContentBytes { get; set; }

VB.NET

<DefaultValue(Nothing)>
Public Overridable Property ContentBytes As Byte()

Property Value

Type	Default	Description
Byte[]	null	A Byte array that contains the image’s contents.

Remarks

The example below demonstrates how to use the ASPxBinaryImage.ContentBytes property.

ASPX

<dxwe:ASPxBinaryImage ID="biImage" runat="server">
</dxwe:ASPxBinaryImage>

<dxwuc:ASPxUploadControl runat="server" ID="ucImageUpload" 
    ClientInstanceName="ucImageUpload" 
    onfileuploadcomplete="ucImageUpload_FileUploadComplete">
    <ValidationSettings AllowedFileExtensions=".jpg,.jpe,.jpeg,.gif">
    </ValidationSettings>
</dxwuc:ASPxUploadControl>

<dxwe:aspxbutton id="btnUpload" runat="server" autopostback="False" text="Upload">
    <ClientSideEvents Click="function(s, e) { ucImageUpload.UploadFile(); }" />
</dxwe:aspxbutton>

<dxwe:aspxbutton id="btnApply" runat="server" text="Apply image from session" 
    onclick="btnApply_Click">
</dxwe:aspxbutton>

C#

protected void ucImageUpload_FileUploadComplete
(object sender, DevExpress.Web.FileUploadCompleteEventArgs e) {
    UploadedFile uploadFile = ucImageUpload.UploadedFiles.Length == 0 ? 
        null : ucImageUpload.UploadedFiles[0];
    Session["UploadedImageBytes"] = uploadFile.FileBytes;
}
protected void btnApply_Click(object sender, EventArgs e) {
    biImage.ContentBytes = (byte[])Session["UploadedImageBytes"];
}

VB.NET

Protected Sub ucImageUpload_FileUploadComplete(ByVal sender As Object, ByVal e As DevExpress.Web.FileUploadCompleteEventArgs)
    Dim uploadFile As UploadedFile = If(ucImageUpload.UploadedFiles.Length = 0, Nothing, ucImageUpload.UploadedFiles(0))
    Session("UploadedImageBytes") = uploadFile.FileBytes
End Sub

Protected Sub btnApply_Click(ByVal sender As Object, ByVal e As EventArgs)
    biImage.ContentBytes = CType(Session("UploadedImageBytes"), Byte())
End Sub

Online Example

View Example: How to display a bar code image in a column

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the ContentBytes property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

asp-net-web-forms-implement-pdf-viewer/CS/PdfViewer.ascx.cs#L109

    bitmap.Save(stream, ImageFormat.Png);
    image.ContentBytes = stream.ToArray();
}

asp-net-web-forms-grid-display-barcode-in-column/CS/ASPxGridViewBarCode/Default.aspx.cs#L20

    if (value != null)
        image.ContentBytes = GetBarCodeImage(value.ToString());
}

VB.NET

asp-net-web-forms-implement-pdf-viewer/VB/PdfViewer.ascx.vb#L115

    bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png)
    image.ContentBytes = stream.ToArray()
End Using

asp-net-web-forms-grid-display-barcode-in-column/VB/ASPxGridViewBarCode/Default.aspx.vb#L22

If value IsNot Nothing Then
    image.ContentBytes = GetBarCodeImage(value.ToString())
End If