Question

我希望能够运行下面的查询并在div中逐行返回结果。结果被添加到哈希表中，我将传递给另一个方法并将其显示在div中。

数组arrayOfQueries [0]中的第一个查询可以返回多行阙：

如何编写此代码来处理此数组中查询返回的多行--- arrayOfQueries [0]。即我希望能够在苛刻的表中存储多行，或者我应该使用stringbuilder对象。

如何在div中显示哈希表的内容。

public Hashtable DisplayResultsToUsers(int genJobId)
{
    Hashtable myHt = new Hashtable();
    try
    {
        string[] arrayOfQueries = new string[4];
        arrayOfQueries[0] = "select generic, customernumber, productcode from u_generic_data where row_status = 2 and generic_job_id =" + genJobId;
        arrayOfQueries[1] = "select count(*) from u_generic_data where row_status = 2 and generic_job_id =" + genJobId;
        arrayOfQueries[2] = "select count(*) from u_generic_data where row_status = 1 and generic_job_id =" + genJobId;
        arrayOfQueries[3] = "select count(*) from u_generic_data where row_status = 0 and generic_job_id =" + genJobId;

        string connect = ConfigurationManager.ConnectionStrings["myconnect"].ConnectionString;

        using (OdbcConnection resConnect = new OdbcConnection(connect))
        {
            string sqlStmt = string.Empty;
            string queryResult = string.Empty;
            int count = 0;
            OdbcCommand dbCmd = new OdbcCommand();
            dbCmd.Connection = resConnect;
            resConnect.Open();

            foreach (string s in arrayOfQueries)
            {
                dbCmd.CommandText = s;
                queryResult =  Convert.ToString(dbCmd.ExecuteScalar());
                count = count + 1;
                myHt.Add(count, queryResult);
            }

            resConnect.Close();
        }

    }
    catch (Exception ex)
    {


    }

    return myHt;

Answer 1

dbCmd.ExecuteScalar()无法使用select generic, customernumber, productcode from u_generic_data where row_status = 2 and generic_job_id =" + genJobId之类的查询。您需要执行dbCmd.ExecuteReader()或其他一些重载来检索这些列。对于ExecuteScalar()查询，select count(*)会很好。

将多个查询的结果添加到集合并在div中显示集合

1 个答案: