PictureBox问题 [英] PictureBox Question
问题描述
我有一个包含图像BLOB字段的表。我想
将图片从
数据库直接复制到一个图片框控件，我已经尝试了以下
：
Dim c as Integer
c = sDataSet.Tables（0）.Rows.Count
Dim bytBLOBData（）As Byte =
sDataSet.Tables（0）.Rows（c-1）（" Image"）
Dim stmBLOBData As New System.IO.MemoryStream（bytBLOBData）
我收到错误无效参数用户在以下行之后：
Me.PictureBox2.Image = Image.FromStream（stmBLOBData）
我也尝试更改以下行 - 仍然是无效参数
用户错误。
Dim bytBLOBData（）As Byte =
CType（sDataSet.Tables（0）.Rows（c-1）（" Image"），Byte（） ）
请有人给我一个想法，请提前谢谢。
问候。
Hi,
I have a table which contains a BLOB field for image. I would like
to copy a picture from
database directly to a picture box control and I have tried the
following:
Dim c as Integer
c = sDataSet.Tables(0).Rows.Count
Dim bytBLOBData() As Byte =
sDataSet.Tables(0).Rows(c-1)("Image")
Dim stmBLOBData As New System.IO.MemoryStream(bytBLOBData)
I get the error "Invalid Parameter user" after the following line:
Me.PictureBox2.Image = Image.FromStream(stmBLOBData)
I also tried changing the following line - still "Invalid Parameter
user" error.
Dim bytBLOBData() As Byte =
CType(sDataSet.Tables(0).Rows(c-1)("Image"), Byte())
Can anyone give me an idea please, thanks in advance.
Regards.
推荐答案
wandii，
尝试将blob中的数据读入SqlBinary，并使用它来构建你的记忆使用SqlBinarys Value属性流
hth
" wandii"写道：
wandii,
try reading the data from your blob into a SqlBinary, and using this to
contruct your memory stream using the SqlBinarys Value property
hth
"wandii" wrote:
我有一个包含图像BLOB字段的表。我想将
数据库中的图片直接复制到图片框控件中，我已经尝试了以下内容：
Dim c as Integer
c = sDataSet.Tables（0）.Rows.Count
Dim bytBLOBData（）As Byte =
sDataSet.Tables（0）.Rows（c-1）（" Image"）
Dim stmBLOBData As New System.IO.MemoryStream（bytBLOBData）
我收到错误Invalid Parameter user在以下行之后：
Me.PictureBox2.Image = Image.FromStream（stmBLOBData）
我也尝试更改以下行 - 仍然是无效参数
用户错误。
Dim bytBLOBData（）As Byte =
CType（sDataSet.Tables（0）.Rows（c-1）（Image），Byte（））
请有人给我一个想法，请提前谢谢。
问候。
Hi,
I have a table which contains a BLOB field for image. I would like
to copy a picture from
database directly to a picture box control and I have tried the
following:
Dim c as Integer
c = sDataSet.Tables(0).Rows.Count
Dim bytBLOBData() As Byte =
sDataSet.Tables(0).Rows(c-1)("Image")
Dim stmBLOBData As New System.IO.MemoryStream(bytBLOBData)
I get the error "Invalid Parameter user" after the following line:
Me.PictureBox2.Image = Image.FromStream(stmBLOBData)
I also tried changing the following line - still "Invalid Parameter
user" error.
Dim bytBLOBData() As Byte =
CType(sDataSet.Tables(0).Rows(c-1)("Image"), Byte())
Can anyone give me an idea please, thanks in advance.
Regards.
你好，
感谢您的回复。我不熟悉SqlBinary可以
你请给我一个小例子。在此先感谢。
家伙写道：
Hi guy,
Thanks for the reply. I am not familiar with the SqlBinary could
you please give
me a small example on this. Thanks in advance.
guy wrote:
wandii，
尝试将blob中的数据读入SqlBinary，然后使用它来
使用SqlBinarys Value属性构建内存流
wandii,
try reading the data from your blob into a SqlBinary, and using this to
contruct your memory stream using the SqlBinarys Value property
hth
你好，
感谢您的回复。我不熟悉SqlBinary可以
你请给我一个小例子。在此先感谢。
家伙写道：
Hi guy,
Thanks for the reply. I am not familiar with the SqlBinary could
you please give
me a small example on this. Thanks in advance.
guy wrote:
wandii，
尝试将blob中的数据读入SqlBinary，然后使用它来
hth
wandii,
try reading the data from your blob into a SqlBinary, and using this to
contruct your memory stream using the SqlBinarys Value property
hth
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