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分享【求助】上传图片到数据库的问题
Stream imgdatastream = File1.PostedFile.InputStream;<-----------此行报错
int imgdatalen = File1.PostedFile.ContentLength;
string imgtype = File1.PostedFile.ContentType;
byte[] imgdata = new byte[imgdatalen];
报错提示：Object reference not set to an instance of an object.
int imgdatalen = File1.PostedFile.ContentLength;
string imgtype = File1.PostedFile.ContentType;
byte[] imgdata = new byte[imgdatalen];
报错提示：Object reference not set to an instance of an object.
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yourbj 2003-10-28
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把html控件做为服务器端控件试试
LighBlade 2003-10-28
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是不是没有把控件作为服务器控件使用，或者是缺少命名空间的引用？
yoobj 2003-10-27
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怎么解决？
yoobj 2003-10-27
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原因查到了。只要我一使用html控件就报这个错误。
未将对象引用设置到对象的实例。
未将对象引用设置到对象的实例。
123456754321 2003-10-25
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int FileLength = UP_FILE.PostedFile.ContentLength;
//string imagefieldname="Picture";
Stream StreamObject = UP_FILE.PostedFile.InputStream;
string imgtype = UP_FILE.PostedFile.ContentType;
string strTableName="ImageStore";
// string[] strColNames={"ImageID","ImageContentType","ImageDescription","ImageSize"};
// object[] objColValues={105,imgtype,"sgdfsdgsasfdaf",FileLength};
string[] strColNames={"ImageID","ImageContentType","ImageDescription","Imagechar","nRoomUseArea","cUnitKind","sFoundYear","cIfLab"};
object[] objColValues={207,imgtype,"sgdfsdgsasfdaf","2","123","1","2003-08","1"};
string imgColName="Picture";
if (FileLength==0)
{
txtMessage.Text = "<b>请你选择你要上传的文件</b>";
}
else
{
bool bl=aaa.InsertRecordIncludeImage(strTableName, strColNames,objColValues,imgColName,FileLength,StreamObject);
txtMessage.Text = bl.ToString();}
//string imagefieldname="Picture";
Stream StreamObject = UP_FILE.PostedFile.InputStream;
string imgtype = UP_FILE.PostedFile.ContentType;
string strTableName="ImageStore";
// string[] strColNames={"ImageID","ImageContentType","ImageDescription","ImageSize"};
// object[] objColValues={105,imgtype,"sgdfsdgsasfdaf",FileLength};
string[] strColNames={"ImageID","ImageContentType","ImageDescription","Imagechar","nRoomUseArea","cUnitKind","sFoundYear","cIfLab"};
object[] objColValues={207,imgtype,"sgdfsdgsasfdaf","2","123","1","2003-08","1"};
string imgColName="Picture";
if (FileLength==0)
{
txtMessage.Text = "<b>请你选择你要上传的文件</b>";
}
else
{
bool bl=aaa.InsertRecordIncludeImage(strTableName, strColNames,objColValues,imgColName,FileLength,StreamObject);
txtMessage.Text = bl.ToString();}
yoobj 2003-10-24
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up
yoobj 2003-10-23
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不行。
yoobj 2003-10-23
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已经加上去了。
2002pine 2003-10-21
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在form标记上加上encType="multipart/form-data"看行不行
<form id="Form1" method="post" runat="server" encType="multipart/form-data">
<form id="Form1" method="post" runat="server" encType="multipart/form-data">
yourbj 2003-10-21
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'加上这个
Stream imgdatastream = new Stream();
'再把这行的Stream 去了
imgdatastream = File1.PostedFile.InputStream;<-----------此行报错
int imgdatalen = File1.PostedFile.ContentLength;
string imgtype = File1.PostedFile.ContentType;
byte[] imgdata = new byte[imgdatalen];
Stream imgdatastream = new Stream();
'再把这行的Stream 去了
imgdatastream = File1.PostedFile.InputStream;<-----------此行报错
int imgdatalen = File1.PostedFile.ContentLength;
string imgtype = File1.PostedFile.ContentType;
byte[] imgdata = new byte[imgdatalen];
yoobj 2003-10-21
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up
godliu521 2003-10-17
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Stream要实力化
要new一下
要new一下
