ASPxBinaryImage.ContentBytes Property

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

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v23.1.dll

NuGet Package: DevExpress.Web

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