Archive for July, 2017

Converting a JavaScript date to the short format (US)

Messing around with JavaScript / jQuery, the date object I was getting back was the Ajax call was being returned in the format Year-Month-Day (2017-06-02). I wanted it Month-Day-Year (06/02/2017). So I created a JS Date object from the string returned, then call the “toLocaleDateString” method call. In this example, “d” is the variable returned from the Ajax call

...
success: function(d) {
if (d != null) {
     var date = new Date(d.Date);
     $("#Date").val(date.toLocaleDateString());
  }
}
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Calling a .NET web service using jQuery

I was attempting to call a .NET web service using jQuery, but was getting this error message:

An attempt was made to call the method \u0027GetCoasters\u0027 using a GET request, which is not allowed

The key to fixing this was to attach the “ScriptMethod” attribute to the web service and setting the “UseHttpGet” property to “true”, which I show below:

[System.Web.Script.Services.ScriptService]
public class OdometerService : System.Web.Services.WebService {

        [System.Web.Script.Services.ScriptMethod(UseHttpGet = true, 
              ResponseFormat = System.Web.Script.Services.ResponseFormat.Json)]
        [WebMethod]
        public string GetCoasters() {
            return "Hello World";
        }
 }

And here is me calling the web service – try to contain your excitement:

$.ajax({
 type: "GET",
 url: "http://localhost:12345/CoasterService.asmx/GetCoasters",
 contentType: "application/json; charset=utf-8",
 dataType: "json",
 success: function (msg) {
      alert('Woohoo!');
 }, error: function (e) {
      alert('Bad stuff - ' + e.responseText);
 }
});

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Passing a list of numbers into an Oracle procedure

I wanted to pass in a list of numbers to an Oracle procedure for use in an “IN” statement, called from C# code. First, the C# code:

  string list = "1,2,3";
  using (OracleCommand comm= new OracleCommand("MyProcedure", connection)) {
     comm.CommandType = CommandType.StoredProcedure;
     comm.Parameters.Add(":pList", OracleDbType.Varchar2, 50).Value = list;
     comm.Parameters.Add(":p_cursor", OracleDbType.RefCursor).Direction = ParameterDirection.Output;

My Oracle procedure was equally awesome:

    PROCEDURE MyProcedure(pList IN VARCHAR2, p_cursor OUT sys_refcursor) IS
        
    BEGIN
        OPEN p_cursor FOR
            SELECT name 
            FROM coasters
            WHERE id IN (SELECT TO_NUMBER(column_value) AS IDs FROM XMLTABLE(pList));
    END;

You can see the “FROM XMLTABLE” statement is doing all the good stuff of splitting the list into the appropriate format. Good times.

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