/// <summary>
/// Writes value of given column of given data row as identifier to given
/// string builder with given prefix if this value was changed.
/// </summary>
/// <param name="row">Data row to extract value.</param>
/// <param name="column">Column name to look for value.</param>
/// <param name="prefix">Prefix to write before.</param>
/// <param name="suffix">Suffix to write after.</param>
/// <param name="target">String builder to write.</param>
public static void WriteIdentifierIfChanged(DataRow row, string column, string prefix, string suffix, StringBuilder target)
{
if (row == null)
{
throw new ArgumentNullException("row");
}
if (String.IsNullOrEmpty(column))
{
throw new ArgumentException(Resources.Error_EmptyString, "column");
}
if (target == null)
{
throw new ArgumentNullException("target");
}
if (DataInterpreter.HasChanged(row, column))
{
if (!String.IsNullOrEmpty(prefix))
{
target.Append(prefix);
}
target.Append(EscapeAndQuoteIdentifier(DataInterpreter.GetString(row, column)));
if (!String.IsNullOrEmpty(suffix))
{
target.Append(suffix);
}
}
}
/// <summary>
/// Writes value of given column of given data row to given string builder.
/// </summary>
/// <param name="row">Data row to extract value.</param>
/// <param name="column">Column name to look for value.</param>
/// <param name="target">String builder to write.</param>
/// <param name="quote">Indicates if value should be quoted.</param>
public static void WriteValue(DataRow row, string column, StringBuilder target, bool quote)
{
if (row == null)
{
throw new ArgumentNullException("row");
}
if (String.IsNullOrEmpty(column))
{
throw new ArgumentException(Resources.Error_EmptyString, "column");
}
if (target == null)
{
throw new ArgumentNullException("target");
}
// Reading string value
string toWrite = DataInterpreter.GetString(row, column);
// If value is not integer, we need quotes and empty strings are allowed
if (!DataInterpreter.IsInteger(row, column))
{
// Substitute null with empty string
if (toWrite == null)
{
toWrite = String.Empty;
}
if (quote)
{
toWrite = EscapeAndQuoteString(toWrite);
}
}
// Append values
target.Append(toWrite);
}
/// <summary>
/// Writes value of given column of given data row to given string builder with
/// given prefix if this value was changed.
/// </summary>
/// <param name="row">Data row to extract value.</param>
/// <param name="column">Column name to look for value.</param>
/// <param name="prefix">Prefix to write.</param>
/// <param name="target">String builder to write.</param>
/// <param name="suffix">Suffix to append after value.</param>
/// <param name="quote">Indicates if value should be quoted.</param>
public static void WriteIfChanged(DataRow row, string column, string prefix, StringBuilder target, string suffix, bool quote)
{
if (row == null)
{
throw new ArgumentNullException("row");
}
if (String.IsNullOrEmpty(column))
{
throw new ArgumentException(Resources.Error_EmptyString, "column");
}
if (target == null)
{
throw new ArgumentNullException("target");
}
if (DataInterpreter.HasChanged(row, column))
{
if (!String.IsNullOrEmpty(prefix))
{
target.Append(prefix);
}
WriteValue(row, column, target, quote);
if (!String.IsNullOrEmpty(suffix))
{
target.Append(suffix);
}
}
}
/// <summary>
/// Extracts otions form the value of given column of given data row into
/// key-value ductionary. " " is used as fields delimeter and "=" it used
/// as key-value delimeter.
/// </summary>
/// <param name="row">DataRow with values to check.</param>
/// <param name="column">Column name.</param>
/// <returns>Returns dictionary with extracted fields</returns>
public static Dictionary <string, string> ExtractFieldsDictionary(DataRow row, string column)
{
if (row == null)
{
throw new ArgumentNullException("row");
}
if (String.IsNullOrEmpty(column))
{
throw new ArgumentException(Resources.Error_EmptyString, "column");
}
return(ExtractFieldsDictionary(DataInterpreter.GetString(row, column)));
}
/// <summary>
/// Checks value of given column of given row for emptiness,
/// considering value as string. Works with default data row
/// version.
/// </summary>
/// <param name="row">DataRow with values to check.</param>
/// <param name="column">Column name.</param>
/// <returns>
/// Returns true, if value of given column of given row is not empty string,
/// and false otherwise.
/// </returns>
public static bool IsNotEmptyString(DataRow row, string column)
{
if (row == null)
{
throw new ArgumentNullException("row");
}
if (String.IsNullOrEmpty(column))
{
throw new ArgumentException(Resources.Error_EmptyString, "column");
}
return(DataInterpreter.IsNotEmptyString(row, column, DataRowVersion.Default));
}
/// <summary>
/// Writes original value of given column of given data row as identifier
/// to given string builder.
/// </summary>
/// <param name="row">Data row to extract value.</param>
/// <param name="column">Column name to look for value.</param>
/// <param name="target">String builder to write.</param>
public static void WriteOldIdentifier(DataRow row, string column, StringBuilder target)
{
if (row == null)
{
throw new ArgumentNullException("row");
}
if (String.IsNullOrEmpty(column))
{
throw new ArgumentException(Resources.Error_EmptyString, "column");
}
if (target == null)
{
throw new ArgumentNullException("target");
}
target.Append(EscapeAndQuoteIdentifier(DataInterpreter.GetString(row, column, DataRowVersion.Original)));
}
/// <summary>
/// Writes given expression to given string builder if value in given column
/// of given data row is equivalent to False.
/// </summary>
/// <param name="row">Data row to extract value.</param>
/// <param name="column">Column name to look for value.</param>
/// <param name="expression">Expression to write to string builder.</param>
/// <param name="target">String builder to write.</param>
public static void WriteIfFalse(DataRow row, string column, string expression, StringBuilder target)
{
if (row == null)
{
throw new ArgumentNullException("row");
}
if (String.IsNullOrEmpty(column))
{
throw new ArgumentException(Resources.Error_EmptyString, "column");
}
if (target == null)
{
throw new ArgumentNullException("target");
}
if (!DataInterpreter.GetSqlBool(row, column))
{
target.Append(expression);
}
}
