Question

我已经设置了一个用户定义的连接字符串，现在尝试使用它来填充gridview，断点显示连接字符串很好..也没有错误，但令人惊讶的是datatable没有收到任何值。尽管数据存在..我做错了什么？

Default3.Aspx：

<td colspan="2" align="center">
  <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">       
  </asp:GridView>     
</td>

Default3.Aspx.Cs：

protected void Page_Load(object sender, EventArgs e)
{
    string con = OracleDatabase.connection();
    String SelectCommand = "select * from EMP";

    OracleDataAdapter adp = new OracleDataAdapter(SelectCommand, con);
    DataTable dt = new DataTable();
    adp.Fill(dt);
    GridView1.DataSource = dt;
    GridView1.DataBind();
    /* 
    OracleDatabase.gridpopulate(SelectCommand, GridView1);
    GridView1.DataSource = OracleDatabase.gridpopulate(SelectCommand);
    GridView1.DataBind();
    */ 
    //i tried doing this by writting a function At class file also
}

类文件：

public static string connection()
{
    oradb = ConfigurationManager.ConnectionStrings["ConnectionString"]
           .ConnectionString;
    string str = "Data Source="+db+";User ID="+userid+";Password="+password+";";
    oradb = String.Concat(oradb, str);        
    con = new OracleConnection(oradb);
    con.Open();
    return oradb;
}

/*(function for gridpopulate)
public static void gridpopulate(string SelectCommand,GridView grid1)
{
    string con =(ConfigurationManager.ConnectionStrings["ConnectionString"]
                 .ConnectionString);
    con = String.Concat(con, str);
    adp = new OracleDataAdapter(SelectCommand,con);
    DataTable dt = new DataTable();
    adp.Fill(dt);
    grid1.DataSource = dt;
    grid1.DataBind();
    //return dt;         
 }
*/

Answer 1

尝试按照以下方式，而不是从函数返回连接字符串返回Oracle Connection对象，并将其传递给Adapter。

OracleConnection con = OracleDatabase.connection();

public static OracleConnection connection()
{
 oradb =ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
 string str = "Data Source="+db+";User ID="+userid+";Password="+password+";";
 oradb = String.Concat(oradb, str);        
 con = new OracleConnection(oradb);
 con.Open();
 return con;
}

gridview不会填充自定义连接字符串和自定义数据源

1 个答案: