public void SetOrderBy(KeyValuePair <string, bool>[] columns)
{
if (columns == null || columns.Length == 0)
{
orderBy = null;
return;
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < columns.Length; ++i)
{
SqlQueryUtils.AppendColumnName(sb, columns[i].Key);
if (columns[i].Value)
{
sb.Append(" DESC");
}
if (i < columns.Length - 1)
{
sb.Append(',');
}
}
orderBy = sb.ToString();
}
public ExpressionClip Replace(string subString, string replaceString)
{
Check.Require(!string.IsNullOrEmpty(subString), "subString could not be null or empty!");
Check.Require(!string.IsNullOrEmpty(replaceString), "replaceString could not be null or empty!");
ExpressionClip expr = ExpressionFactory.CreateCloneExpression(this);
StringBuilder sb = new StringBuilder();
sb.Append("REPLACE(");
SqlQueryUtils.AppendColumnName(sb, this.Sql);
sb.Append(',');
string paramName = MakeUniqueParamNameWithoutPrefixToken();
sb.Append(paramName);
sb.Append(',');
string paramName2 = MakeUniqueParamNameWithoutPrefixToken();
sb.Append(paramName2);
sb.Append(')');
expr.sql = sb;
expr.dbType = DbType.Int32;
expr.parameters.Add(paramName, new KeyValuePair <DbType, object>(this.dbType, subString));
expr.Parameters.Add(paramName2, new KeyValuePair <DbType, object>(this.dbType, replaceString));
return(expr);
}
public DbCommand CreateSelectCommand(WhereClip where, string[] columns)
{
Check.Require(((object)where) != null && where.From != null, "expr and expr.From could not be null!");
Check.Require(columns != null && columns.Length > 0, "columns could not be null or empty!");
DbCommand cmd = fac.CreateCommand();
cmd.CommandType = CommandType.Text;
StringBuilder sb = new StringBuilder("SELECT ");
for (int i = 0; i < columns.Length; ++i)
{
SqlQueryUtils.AppendColumnName(sb, columns[i]);
if (i < columns.Length - 1)
{
sb.Append(',');
}
}
sb.Append(" FROM ");
sb.Append(where.ToString());
AddExpressionParameters(where, cmd);
cmd.CommandText = SqlQueryUtils.ReplaceDatabaseTokens(sb.ToString(), leftToken, rightToken, paramPrefixToken, wildcharToken, wildsinglecharToken);
PrepareCommand(cmd);
return(cmd);
}
public static string ValidColumnName(string columnName)
{
Check.Require(columnName != null, "columnName could not be null!");
StringBuilder sb = new StringBuilder();
SqlQueryUtils.AppendColumnName(sb, columnName);
return(sb.ToString());
}
protected void InitColumnExpression(string columnName, DbType type)
{
if (this.sql.Length > 0)
{
this.sql = new StringBuilder();
}
SqlQueryUtils.AppendColumnName(this.sql, columnName);
this.DbType = type;
}
private static string Func(string funcName, string columnName)
{
Check.Require(!string.IsNullOrEmpty(funcName), "funcName could not be null or empty!");
Check.Require(!string.IsNullOrEmpty(columnName), "columnName could not be null or empty!");
StringBuilder sb = new StringBuilder(funcName);
sb.Append("(");
SqlQueryUtils.AppendColumnName(sb, columnName);
sb.Append(')');
return(sb.ToString());
}
public static string DatePart(string columnName, DatePartType partType)
{
Check.Require(!string.IsNullOrEmpty(columnName), "columnName could not be null or empty!");
StringBuilder sb = new StringBuilder("DATEPART(");
sb.Append(partType.ToString());
sb.Append(',');
SqlQueryUtils.AppendColumnName(sb, columnName);
sb.Append(')');
return(sb.ToString());
}
public static string Count(string columnName, bool isDistinct)
{
Check.Require(!string.IsNullOrEmpty(columnName), "columnName could not be null or empty!");
StringBuilder sb = new StringBuilder();
sb.Append("COUNT(");
if (isDistinct)
{
sb.Append("DISTINCT ");
}
SqlQueryUtils.AppendColumnName(sb, columnName);
sb.Append(')');
return(sb.ToString());
}
//public static string SubString(string columnName, int start)
//{
// Check.Require(!string.IsNullOrEmpty(columnName), "columnName could not be null or empty!");
// Check.Require(start >= 0, "start must >= 0!");
// StringBuilder sb = new StringBuilder("SUBSTRING(");
// SqlQueryUtils.AppendColumnName(sb, columnName);
// sb.Append(',');
// sb.Append(start + 1);
// sb.Append(",LEN(");
// SqlQueryUtils.AppendColumnName(sb, columnName);
// sb.Append(')');
// sb.Append(')');
// return sb.ToString();
//}
public static string SubString(string columnName, int start, int length)
{
Check.Require(!string.IsNullOrEmpty(columnName), "columnName could not be null or empty!");
Check.Require(start >= 0, "start must >= 0!");
Check.Require(length >= 0, "length must = 0!");
StringBuilder sb = new StringBuilder("SUBSTRING(");
SqlQueryUtils.AppendColumnName(sb, columnName);
sb.Append(',');
sb.Append(start + 1);
sb.Append(',');
sb.Append(length);
sb.Append(')');
return(sb.ToString());
}
public void SetGroupBy(string[] columns)
{
if (columns == null || columns.Length == 0)
{
groupBy = null;
return;
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < columns.Length; ++i)
{
SqlQueryUtils.AppendColumnName(sb, columns[i]);
if (i < columns.Length - 1)
{
sb.Append(',');
}
}
groupBy = sb.ToString();
}
public ExpressionClip SubString(int start)
{
Check.Require(start >= 0, "start must >= 0!");
ExpressionClip expr = ExpressionFactory.CreateCloneExpression(this);
ExpressionClip cloneExpr = ExpressionFactory.CreateCloneExpression(this);
StringBuilder sb = new StringBuilder("SUBSTRING(");
SqlQueryUtils.AppendColumnName(sb, this.Sql);
sb.Append(',');
sb.Append(start + 1);
sb.Append(",LEN(");
SqlQueryUtils.AppendColumnName(sb, cloneExpr.Sql);
sb.Append(')');
sb.Append(')');
expr.sql = sb;
SqlQueryUtils.AddParameters(expr.parameters, cloneExpr);
return(expr);
}