Expose ReturnValue via SP T4 template and OrmLiteSPStatement

Author: rsafier

src/ServiceStack.OrmLite/OrmLiteSPStatement.cs

@@ -24,6 +24,15 @@ public bool TryGetParameterValue(string parameterName, out object value)
             }
         }
 
+        public int ReturnValue
+        {
+            get
+            {
+                var returnValue = ((IDataParameter)dbCmd.Parameters["__ReturnValue"]).Value;
+                return (int)returnValue;
+            }
+        }
+
         public OrmLiteSPStatement(IDbCommand dbCmd)
             : this(null, dbCmd) {}
 

src/T4/OrmLite.SP.tt

@@ -34,7 +34,7 @@ namespace <#=SPNamespace#>
 			param.Direction = paramDirection;
 			param.DbType = paramType;
 			param.ParameterName = paramName;
-			param.Value = paramValue;
+			param.Value = paramValue ?? DBNull.Value;
 			return param;
 		}
 
@@ -47,6 +47,7 @@ namespace <#=SPNamespace#>
 <#if (sp.Parameters.Count > 0) { foreach(var param in sp.Parameters){#>
 			dbCmd.Parameters.Add(CreateNewParameter(dbCmd,"<#=param.Name#>",@<#=Inflector.MakeInitialLowerCase(param.Name)#>,<#=GetParamDirection(param.Direction)#>,<#=param.DbType#>));
 <#}#> <#}#>
+dbCmd.Parameters.Add(CreateNewParameter(dbCmd,"__ReturnValue",0,ParameterDirection.ReturnValue,DbType.Int32));
 			return new OrmLiteSPStatement(db, dbCmd);
 		}