如何在Microsoft报表中显示来自字节数组的图像 [英] How to show Image from byte array in Microsoft report

问题描述

我正在使用Report文件和ReportViewer控件来显示一个报告，该报告在运行时动态地从对象加载数据。

I am using a Report file and a ReportViewer control to show a report which loads data dynamically from objects during run-time.

我需要显示一个图像在对象中存储为字节数组。

I need to show an image which is stored as a byte array in the object.

PictureBox的值当前设置为：

The PictureBox's value is currently set to:

=First(Fields!ImageData.Value, "dtstItemImage")

我使用以下方法设置DataSource：

And I set the DataSource using:

ImageBindingSource.DataSource = this.item.Image.ImageData;

代码编译并运行但图像未显示在报告中 。

这是因为PictureBox需要绑定到Image对象（而不是字节数组）吗？或者是否可能需要设置PictureBox的某些属性？

Is this because the PictureBox needs to be bound to an Image object (and not to a byte array)? Or are there perhaps some properties of the PictureBox which I need to set?

更新1

我为PictureBox添加了一个边框，只是为了确保它是可见的，它确实显示在报告中。它只是不包含图像。

I've added a border to the PictureBox just to make sure that's its visible and it does show up in the report. It just doesn't contain the image.

更新2

我'修复了我的代码中的错误。我改变了：

I've fixed a mistake in my code. I've changed:

ImageBindingSource.DataSource = this.item.Image.ImageData;

to：

ImageBindingSource.DataSource = this.item.Image;

因为PictureBox绑定到ImageData字段但DataSource是Image对象。

as the PictureBox is bound to the ImageData field BUT the DataSource is the Image object.

现在我得到一个小的十字图标而不是什么（至少对我而言）表示一些进展但我不知道字节[] - 位图转换代码需要在哪里。

Now I get a small cross icon instead of nothing which (at least for me) indicates some progress but I don't know where the byte[]-bitmap conversion code needs to be.

推荐答案

我设法通过设置报告的图像框来源属性数据库 （以前设置为外部）。

I managed to solve this by setting the report's Image box Source property to Database (it was previously set to External).

有关不同可用源值的更多信息，请参阅（MSDN）如何：添加图像（Reporting Services）。

More info about the different available Source values can be found at (MSDN) HowTo: Add an Image (Reporting Services).

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