/// <summary>
/// Initializes a new instance of the <see cref="SWParameterAttribute"/> class with the specified
/// <see cref="Name"/>, <see cref="SqlDbType"/>, <see cref="Size"/>, <see cref="Precision"/>,
/// <see cref="Scale"/>, <see cref="TreatAsNull"/> and <see cref="ParameterType"/> values
/// </summary>
/// <param name="name">Is a value of <see cref="Name"/> property</param>
/// <param name="sqlDbType">Is a value of <see cref="SqlDbType"/> property</param>
/// <param name="size">Is a value of <see cref="Size"/> property</param>
/// <param name="precision">Is a value of <see cref="Precision"/> property</param>
/// <param name="scale">Is a value of <see cref="Scale"/> property</param>
/// <param name="treatAsNull">Is a value of <see cref="TreatAsNull"/> property</param>
/// <param name="parameterType">Is a value of <see cref="ParameterType"/> property</param>
public SWParameterAttribute(string name, SqlDbType sqlDbType, int size, byte precision, byte scale, object treatAsNull, SWParameterType parameterType)
{
Name = name;
SqlDbType = sqlDbType;
Size = size;
Precision = precision;
Scale = scale;
TreatAsNull = treatAsNull;
ParameterType = parameterType;
}
/// <summary>
/// Initializes a new instance of the <see cref="SWParameterAttribute"/> class
/// </summary>
/// <param name="parameterType">Is a value of <see cref="ParameterType"/> property</param>
/// <param name="name">Is a value of <see cref="Name"/> property</param>
public SWParameterAttribute(SWParameterType parameterType, string name)
{
ParameterType = parameterType;
m_name = name;
}
/// <summary>
/// Initializes a new instance of the <see cref="SWParameterAttribute"/> class
/// </summary>
/// <param name="parameterType">Is a value of <see cref="ParameterType"/> property</param>
public SWParameterAttribute(SWParameterType parameterType)
{
ParameterType = parameterType;
}
/// <summary>
/// Initializes a new instance of the <see cref="SWParameterAttribute"/> class
/// </summary>
/// <param name="parameterType">Is a value of <see cref="ParameterType"/> property</param>
/// <param name="size">Is a value of <see cref="Size"/> property</param>
public SWParameterAttribute(SWParameterType parameterType, int size)
{
ParameterType = parameterType;
Size = size;
}
/// <summary>
/// Initializes a new instance of the <see cref="SWParameterAttribute"/> class with the specified
/// <see cref="Name"/>, <see cref="SqlDbType"/>, <see cref="Size"/>, <see cref="Precision"/>,
/// <see cref="Scale"/>, <see cref="TreatAsNull"/> and <see cref="ParameterType"/> values
/// </summary>
/// <param name="name">Is a value of <see cref="Name"/> property</param>
/// <param name="sqlDbType">Is a value of <see cref="SqlDbType"/> property</param>
/// <param name="size">Is a value of <see cref="Size"/> property</param>
/// <param name="precision">Is a value of <see cref="Precision"/> property</param>
/// <param name="scale">Is a value of <see cref="Scale"/> property</param>
/// <param name="treatAsNull">Is a value of <see cref="TreatAsNull"/> property</param>
/// <param name="parameterType">Is a value of <see cref="ParameterType"/> property</param>
public SWParameterAttribute(string name, SqlDbType sqlDbType, int size, byte precision, byte scale, object treatAsNull, SWParameterType parameterType)
{
Name = name;
SqlDbType = sqlDbType;
Size = size;
Precision = precision;
Scale = scale;
TreatAsNull = treatAsNull;
ParameterType = parameterType;
}
/// <summary>
/// Initializes a new instance of the <see cref="SWParameterAttribute"/> class
/// </summary>
/// <param name="parameterType">Is a value of <see cref="ParameterType"/> property</param>
/// <param name="name">Is a value of <see cref="Name"/> property</param>
public SWParameterAttribute(SWParameterType parameterType, string name)
{
ParameterType = parameterType;
m_name = name;
}
/// <summary>
/// Initializes a new instance of the <see cref="SWParameterAttribute"/> class
/// </summary>
/// <param name="parameterType">Is a value of <see cref="ParameterType"/> property</param>
/// <param name="size">Is a value of <see cref="Size"/> property</param>
public SWParameterAttribute(SWParameterType parameterType, int size)
{
ParameterType = parameterType;
Size = size;
}
/// <summary>
/// Initializes a new instance of the <see cref="SWParameterAttribute"/> class
/// </summary>
/// <param name="parameterType">Is a value of <see cref="ParameterType"/> property</param>
public SWParameterAttribute(SWParameterType parameterType)
{
ParameterType = parameterType;
}
/// <summary>
/// Generates command parameters.
/// For some command types the command text can be changed during parameter generating.
/// </summary>
/// <param name="command">Command object.</param>
/// <param name="method"><see cref="MethodInfo"/> type object</param>
/// <param name="values">Array of values for the command parameters.</param>
/// <param name="swCommandType"><see cref="SWCommandType"/> enumeration value</param>
/// <param name="indexes">Array of parameter indices.</param>
private static void GenerateCommandParameters(DbCommand command, MethodInfo method, object[] values, int[] indexes, SWCommandType swCommandType)
{
#region InsertUpdate parts declaration
string sUpdatePart1 = "";
string sUpdatePart2 = "";
string sUpdate = "";
string sInsertPart1 = "";
string sInsertPart2 = "";
string sInsert = "";
string sAutoincrementColumnName = "";
#endregion
//DatabaseHelper db = new DatabaseHelper();
ParameterInfo[] methodParameters = method.GetParameters();
int sqlParamIndex = 0;
for (int paramIndex = 0; paramIndex < methodParameters.Length; ++paramIndex)
{
indexes[paramIndex] = -1;
ParameterInfo paramInfo = methodParameters[paramIndex];
// create command parameter
DbParameter sqlParameter = command.CreateParameter();
// set default values
string paramName = paramInfo.Name;
SWParameterType paramCustType = SWParameterType.Default;
object v = values[paramIndex];
// get parameter attribute and set command parameter settings
SWParameterAttribute paramAttribute = (SWParameterAttribute)Attribute.GetCustomAttribute(paramInfo, typeof(SWParameterAttribute));
if (paramAttribute != null)
{
paramCustType = paramAttribute.ParameterType;
if (paramAttribute.IsNameDefined)
{
paramName = sqlParameter.ParameterName;
}
if (paramAttribute.IsTypeDefined)
{
sqlParameter.DbType = (DbType)paramAttribute.SqlDbType;
}
if (paramAttribute.IsSizeDefined)
{
sqlParameter.Size = paramAttribute.Size;
}
//if (paramAttribute.IsScaleDefined)
// sqlParameter.Scale = paramAttribute.Scale;
//if (paramAttribute.IsPrecisionDefined)
// sqlParameter..Precision = paramAttribute.Precision;
if (CompareTreatAsNullValues(paramAttribute.TreatAsNull, v, paramInfo.ParameterType))
{
v = DBNull.Value;
}
}
// parameter direction
if (paramCustType == SWParameterType.SPReturnValue)
{
sqlParameter.Direction = ParameterDirection.ReturnValue;
sqlParameter.DbType = DbType.Int32;
}
else if (paramInfo.ParameterType.IsByRef)
{
sqlParameter.Direction = paramInfo.IsOut ? ParameterDirection.Output : ParameterDirection.InputOutput;
}
else
{
sqlParameter.Direction = ParameterDirection.Input;
}
// generate parts of InsertUpdate expresion
#region generate parts of InsertUpdate expresion
if (paramCustType == SWParameterType.Identity)
{
if (sAutoincrementColumnName.Length > 0)
{
throw new SqlWrapperException("Only one identity parameter is possible");
}
sAutoincrementColumnName = paramName;
Type reftype = GetRefType(paramInfo.ParameterType);
if (reftype == null)
{
throw new SqlWrapperException("Identity parameter must be ByRef parameter");
}
// check default value
if (paramAttribute.TreatAsNull.ToString() == SWParameterAttribute.NullReturnValueToken)
{
if (Convert.ToInt64(v) <= 0)
{
v = DBNull.Value;
}
}
}
if (swCommandType == SWCommandType.InsertUpdate)
{
string fieldName = "[" + paramName + "]";
string cmdparamName = "@" + paramName;
if (paramCustType != SWParameterType.Identity)
{
sInsertPart1 = AddWithDelim(sInsertPart1, ", ", fieldName);
sInsertPart2 = AddWithDelim(sInsertPart2, ", ", cmdparamName);
}
if ((paramCustType == SWParameterType.Key) || (paramCustType == SWParameterType.Identity))
{
sUpdatePart2 = AddWithDelim(sUpdatePart2, " and ", fieldName + "=" + cmdparamName);
}
if (paramCustType != SWParameterType.Identity)
{
sUpdatePart1 = AddWithDelim(sUpdatePart1, ", ", fieldName + "=" + cmdparamName);
}
}
#endregion
// set parameter name
sqlParameter.ParameterName = "@" + paramName;
// set parameter value
if (v == null)
{
v = DBNull.Value;
}
sqlParameter.Value = values[paramIndex]; // this is to set a proper data type
sqlParameter.Value = v;
// add parameter to the command object
command.Parameters.Add(sqlParameter);
indexes[paramIndex] = sqlParamIndex;
sqlParamIndex++;
}
// in case of InsertUpdate command type compile new command text
#region generate InsertUpdate expresion
if (swCommandType == SWCommandType.InsertUpdate)
{
string TableName = command.CommandText;
string CommandText = "";
if (sUpdatePart2 == "")
{
throw new SqlWrapperException("No Identity or Autoincrement field is defined.");
}
sInsert = String.Format(" insert into [{0}]({1}) values({2}) ", TableName, sInsertPart1, sInsertPart2);
sUpdate = String.Format(" update [{0}] set {1} where {2} ", TableName, sUpdatePart1, sUpdatePart2);
if (sAutoincrementColumnName == "")
{
CommandText += String.Format("{0} if (@@rowcount = 0) {1}", sUpdate, sInsert);
}
else
{
CommandText += String.Format("if(@{0} is NULL) begin {1} select @{0} = SCOPE_IDENTITY() end ", sAutoincrementColumnName, sInsert);
CommandText += String.Format("else begin {0} end", sUpdate);
}
command.CommandText = CommandText;
}
#endregion
}