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 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());
}
/// <summary>
/// Initializes a new instance of the <see cref="QueryColumn"/> class.
/// </summary>
/// <param name="dbColName">Name of the database col.</param>
/// <param name="type">The type.</param>
/// <param name="entityPropertyName">Name of the entity property.</param>
/// <param name="isPk">if set to <c>true</c> [is pk].</param>
/// <param name="isAutoIncrement">是否为自增长属性</param>
/// <remarks>
/// <para>创建：Teddy</para>
/// <para>日期：2018/3/22</para>
/// </remarks>
public QueryColumn(string dbColName, DbType type, string entityPropertyName, bool isPk, bool isAutoIncrement)
{
Check.Require(!string.IsNullOrEmpty(dbColName), "dbColName could not be null or empty.");
SqlQueryUtils.AppendColumnName(this.sql, dbColName);
this.entityPropertyName = entityPropertyName;
this.DbType = type;
this.IsPK = isPk;
this.IsAutoIncrement = isAutoIncrement;
}
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 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 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(')');
//sb.Append(" [COUNT_");
//sb.Append(columnName.Replace("*", "ALL").Replace(" ", "_").Replace(".", "_").Replace("[", string.Empty).Replace("]", string.Empty));
//sb.Append(']');
return(sb.ToString());
}
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(')');
//if (funcName == "SUM" || funcName == "AVG" || funcName == "MIN" || funcName == "MAX")
//{
// sb.Append(" [");
// sb.Append(funcName);
// sb.Append("_");
// sb.Append(columnName.Replace("*", "ALL").Replace(" ", "_").Replace(".", "_").Replace("[", string.Empty).Replace("]", string.Empty));
// sb.Append(']');
//}
return(sb.ToString());
}
internal 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();
}
