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POProblem with adding SQL paramerters from data access Layer in c#
 

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  1. POProblem with adding SQL paramerters from data access Layer in c#
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    <p>First I am giving examples of two methods</p> <pre><code>public static List&lt;FormGridEntity&gt; GetAllCandidatesByProgram(string programShortName) { List&lt;FormGridEntity&gt; formGridEntities = null; try { string cmd = SELECT + " WHERE " + CANDIDATE_PROGRAM_PA + " = " + CANDIDATE_PROGRAM;`enter code here` //string cmd = SELECT DAOParameters dps = new DAOParameters(); dps.AddParameter(CANDIDATE_PROGRAM_PA, programShortName); List&lt;SqlParameter&gt; ps = Common.Methods.GetSQLParameters(dps); SqlDataReader dataReader = QueryHandler.ExecuteSelectQuery(cmd, ps); formGridEntities = Maps(dataReader); dataReader.Close(); } catch (Exception exception) { throw exception; } return formGridEntities; } </code></pre> <p>and another method is </p> <pre><code>public static List&lt;FormGridEntity&gt; GetAllCandidatesByDates(DateTime initialDate,DateTime finalDate) { List&lt;FormGridEntity&gt; formGridEntities = null; try { string cmd = SELECT + " WHERE " + FORM_SUBMISSION_DATE_PA + " BETWEEN " + initialDate + " AND " + finalDate; //string cmd = SELECT DAOParameters dps = new DAOParameters(); //What will I do here? since **//dps.AddParameter(FORM_SUBMISSION_DATE_PA, initialDate); //dps.AddParameter(FORM_SUBMISSION_DATE_PA, finalDate);** List&lt;SqlParameter&gt; ps = Common.Methods.GetSQLParameters(dps); SqlDataReader dataReader = QueryHandler.ExecuteSelectQuery(cmd, ps); formGridEntities = Maps(dataReader); dataReader.Close(); } catch (Exception exception) { throw exception; } return formGridEntities; } </code></pre> <p>I have commentd out</p> <p>Here the caps terms are all constants that above in the class like</p> <pre><code>private const string FORM_PURCHASING_DATE = "DateOfPurchase"; private const string FORM_PURCHASING_DATE_PA = "@DateOfPurchase" private const string FORM_SUBMISSION_DATE = "DateOfSubmission"; private const string FORM_SUBMISSION_DATE_PA = "@DateOfSubmission"; </code></pre> <p>the SELECT is also defined correctly. I am using this Layer perfectly. But now a scenario ocurred where I am getting confused what to do. So far I have been adding values with parameter that has one to one relationship. But, in my second method, I am using the between operator where two values is referring to one parameter, what will I write here to make the things working properly. I have commented out the particular region that I want to modify. please help me if possible. Here is the method GetSQLParameters public static List GetSQLParameters(DAOParameters dps) { List parameters = new List();</p> <pre><code> foreach (DictionaryEntry de in dps.hs) { SqlParameter p = new SqlParameter(); p.ParameterName = de.Key.ToString(); if (de.Value.ToString() == Convert.ToString(0)) { p.Value = DBNull.Value; } else { p.Value = de.Value; } parameters.Add(p); } return parameters; </code></pre>
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    1. USPankouri
    1. USPankouri
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    1. COi'm confused, two values for one parameter? do you mean if some value holds true that you change the parameter value?
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      1. USdeveloperdoug
    2. COno thing about the between operator in sql query, here two values are used as boundary for one column value.
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      1. POProblem with adding SQL paramerters from data access Layer in c#
      1. USPankouri
    3. COCould you show code of the Common.Methods.GetSQLParameters() method?
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      1. POProblem with adding SQL paramerters from data access Layer in c#
      1. USsll
 

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