
c#中将保存在数据库中的照片到picturebox,显示参数无效 5
stringStr;Str="selecteimagefromemployeewhereeno="+u.Name;conn=newSqlConnection("DataS...
string Str;
Str = "select eimage from employee where eno = " + u.Name;
conn = new SqlConnection("Data Source=.\\SQLEXPRESS;Initial Catalog=apply_for_adminination;Integrated Security=True");
conn.Open();
cmd = new SqlCommand(Str, conn);
byte[] bytt = (byte[])cmd.ExecuteScalar();
if (bytt != null)
{
MemoryStream ms = new MemoryStream(bytt);
this.pictureBox1.Image = Image.FromStream(ms);
}
else
MessageBox.Show("未查询到图片"); 展开
Str = "select eimage from employee where eno = " + u.Name;
conn = new SqlConnection("Data Source=.\\SQLEXPRESS;Initial Catalog=apply_for_adminination;Integrated Security=True");
conn.Open();
cmd = new SqlCommand(Str, conn);
byte[] bytt = (byte[])cmd.ExecuteScalar();
if (bytt != null)
{
MemoryStream ms = new MemoryStream(bytt);
this.pictureBox1.Image = Image.FromStream(ms);
}
else
MessageBox.Show("未查询到图片"); 展开
1个回答
展开全部
我看了一下你的代码,大概只能找到一个错误,你这个参数无效是哪一行抛出的?
Str = "select eimage from employee where eno = " + u.Name;
改成
Str = "select eimage from employee where eno = '" + u.Name + "'";
追问
这个是没有问题的因为我的u.Name是int类型的
追答
那你错误是哪一行抛出的?
如果是image赋值那一行,我猜是不是这个并不是个图片文件?
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