一、取得数据表 i 行 j 列的值 //建立并打开数据库连接 OleDbConnection conn=new OleDbConnection(); conn.ConnectionString=strConnectionString;//strConnectionString为数据库连接字符串 conn.Open(); string sql="select * from NewsClass order by ClassId desc"; string x; DataSet ds=new DataSet(); OleDbDataAdapter da=new OleDbDataAdapter(sql,conn); da.Fill(ds,"NewsTable"); DataTable dt=ds.Tables["NewsTable"]; x=dt.Rows[i][1].ToString()//数据表i行j列的值 conn.close();
二、将数据读入DropDownList (1) DropDownList中添加数据 //建立并打开数据库连接 OleDbConnection conn=new OleDbConnection(); conn.ConnectionString=strConnectionString;//strConnectionString为数据库连接字符串 conn.Open(); string sql="select * from NewsClass order by ClassId desc"; //建立数据集 DataSet ds=new DataSet(); OleDbDataAdapter da=new OleDbDataAdapter(sql,conn); da.Fill(ds,"NewsTable"); this.DropDownList1.DataSource=ds; this.DropDownList1.DataTextField = "ClassName";//Text值 this.DropDownList1.DataValueField = "ClassID";//Value值 this.DropDownList1.DataBind(); conn.Close(); (2)选中DropDownList的某项 this.DropDownList1.Items.FindByValue(dr["ClassID"].ToString().Trim()).Selected=true;//dr为DataRow 三、分类编码检索出相应的分类名称并在DataGrid中显示 (1).ASPX中的代码(ClassID为分类编码): <asp:TemplateColumn HeaderText="类 别"> <ItemTemplate> <asp:Label id=lblClass runat="server" Text=''''<%# GetClassName(Convert.ToInt32(DataBinder.Eval(Container, "DataItem.ClassID"))) %>''''> </asp:Label> </ItemTemplate> </asp:TemplateColumn>
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