看似简单的问题,怎样取出图片?
就是想实现像图片新闻那种,
数据库字段为：
imgid imgtype imgtitle imgdata
1 植物图片 白杨树 二进制图片
步骤
1、 我拖了一个gridview的控件。
2、然后数据绑定（代码后）。
3、但是不显示图片,为imgdata输出不是图片而一个 "System.Byte。 "不知道为什么？
或者应该怎么显示图片？
<asp:GridView ID= "GridView1 " runat= "server " DataKeyNames= "docID " AutoGenerateColumns= "False ">
<Columns>
<asp:BoundField DataField= "docid " HeaderText= "docID " />
<asp:BoundField DataField= "doctitle " HeaderText= "doctitle " />
<asp:BoundField DataField= "doctype " HeaderText= "doctype " />
<asp:TemplateField HeaderText= "imgdata ">
<ItemTemplate>
<%# Eval( "imgdata ")%>
</ItemTemplate>
<EditItemTemplate>
<asp:Image ID= "Image1 " runat= "server " Value= ' <%# Eval( "imgdata ") %> '/>
</EditItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
数据绑定:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack) Bindgridview();
{
}
}
private void Bindgridview()
{
String strConnection = ConfigurationSettings.AppSettings[ "ConnectionString "];
SqlConnection myConnection = new SqlConnection(strConnection);
SqlDataAdapter da = new SqlDataAdapter( "select docid,doctype,doctitle,doc from tblbooksupload ", myConnection);
DataSet ds = new DataSet();
da.Fill(ds, "tblbooksupload ");
DataView dv = ds.Tables[0].DefaultView;
GridView1.DataSource = dv;
GridView1.DataBind();
}
[解决办法]
用HttpHandler(.ashx)动态显示数据库中的图片思路差不多
http://blog.csdn.net/deepbluekk/archive/2006/03/16/626369.aspx
[解决办法]
路径不对吧
