请问在 C# 存取数据库中的图像
http://www.中


在构造函数中添加代码

       string sqlstr="select * from pub_info";

       conn=new SqlConnection(connString);

       adapter=new SqlDataAdapter(sqlstr,conn);

       SqlCommandBuilder builder=new SqlCommandBuilder(adapter);

       adapter.UpdateCommand=builder.GetUpdateCommand();

       dataset=new DataSet();

       adapter.Fill(dataset,"pub_info");

       //将text1Box1的Text属性绑定到dataset中的pub_info表的pr_info字段

       this.textBox1.DataBindings.Add(new Binding("Text",dataset,"pub_info.pr_info"));

       for(int i=0;i<dataset.Tables[0].Rows.Count;i++)

       {

              this.listBox1.Items.Add(dataset.Tables[0].Rows[i][0]);

       }




其中adapter.UpdateCommand=builder.GetUpdateCommand();

       dataset=new DataSet();

       adapter.Fill(dataset,"pub_info");
接口无效是为什么呢