C#数据库连接（代码连接）

aspx

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="cno">
    <Columns>
        <asp:TemplateField>
            <ItemTemplate>
                <%#DataBinder.Eval(Container.DataItem,"cno")%>
                <%#DataBinder.Eval(Container.DataItem,"cname")%>
                <%#DataBinder.Eval(Container.DataItem,"ccredit")%>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

cs

string strConn = WebConfigurationManager.ConnectionStrings["i05ConnectionString2"].ToString();
SqlConnection ConnAcc = new SqlConnection(strConn); //Sql链接类的实例化
ConnAcc.Open(); //打开数据库
string strSQL = "SELECT * FROM course"; //要执行的SQL语句 
SqlDataAdapter da = new SqlDataAdapter(strSQL, ConnAcc); //创建DataAdapter数据适配器实例
DataSet ds = new DataSet(); //创建DataSet实例
da.Fill(ds, "112233"); //使用DataAdapter的Fill方法(填充)，调用SELECT命令
GridView1.DataSource = ds; //设置数据源
GridView1.DataBind(); //绑定数据
ConnAcc.Close(); //关闭数据库

web.config

<connectionStrings>
    <add name="i05ConnectionString" connectionString="Data Source=localhost;Initial Catalog=i05;
　　　　Integrated Security=True" providerName="System.Data.SqlClient" />
    <add name="i05ConnectionString2" connectionString="Data Source=aidd2008;
　　　　Initial Catalog=i05;User ID=i05;Password=i05630229" providerName="System.Data.SqlClient" />
</connectionStrings>