public static IParamBuilder CreateInSql(TkDbContext context, IFieldInfo fieldName,
IEnumerable <string> values)
{
TkDebug.AssertArgumentNull(fieldName, "fieldName", null);
TkDebug.AssertArgumentNull(values, "values", null);
string[] valueArray = values.ToArray();
if (valueArray.Length == 0)
{
return(ParamBuilder.NoResult);
}
string seperator = string.Empty;
switch (fieldName.DataType)
{
case TkDataType.String:
seperator = "\'";
break;
case TkDataType.Int:
case TkDataType.Byte:
case TkDataType.Short:
case TkDataType.Double:
case TkDataType.Long:
break;
default:
TkDebug.ThrowToolkitException(string.Format(ObjectUtil.SysCulture,
"生成IN SQL语句的字段只支持字符串、整形、浮点三种类型，现在字段{0}类型是{1}，不在支持范围",
fieldName.FieldName, fieldName.DataType), null);
break;
}
var items = from value in valueArray
select seperator + StringUtil.EscapeAposString(value) + seperator;
string insql = string.Join(",", items);
string field;
if (context != null)
{
field = context.EscapeName(fieldName.FieldName);
}
else
{
field = fieldName.FieldName;
}
string sql = string.Format(ObjectUtil.SysCulture, "{0} IN ({1})",
field, insql);
InternalParamBuilder builder = new InternalParamBuilder {
Sql = sql
};
return(builder);
}
internal static IParamBuilder InternalCreateSingleSql(TkDbContext context, string fieldName,
TkDataType type, string oper, string paramName, object fieldValue)
{
TkDebug.AssertArgumentNull(context, "context", null);
TkDebug.AssertArgumentNullOrEmpty(fieldName, "fieldName", null);
TkDebug.AssertArgumentNullOrEmpty(oper, "oper", null);
TkDebug.AssertArgumentNullOrEmpty(paramName, "paramName", null);
TkDebug.AssertArgumentNull(fieldValue, "fieldValue", null);
InternalParamBuilder builder = new InternalParamBuilder
{
Sql = CreateSingleSql(context, fieldName, oper, paramName)
};
builder.Parameters.Add(paramName, type, fieldValue);
return(builder);
}
private static IParamBuilder LinkParamBuilder(IEnumerable <IParamBuilder> builders,
string linkOperator)
{
int j = 0;
InternalParamBuilder result = new InternalParamBuilder();
StringBuilder builder = new StringBuilder();
foreach (IParamBuilder item in builders)
{
string sql = item.Sql;
TkDebug.AssertNotNullOrEmpty(sql, string.Format(ObjectUtil.SysCulture,
"builders参数第{0}个IParamBuilder生成的Sql是空，这是不允许的", j), item);
if (j > 0)
{
builder.Append(linkOperator);
}
builder.Append("(").Append(sql).Append(")");
//StringUtil.JoinStringItem(builder, i++, "(" + sql + ")", linkOperator);
DbParameterList itemParams = item.Parameters;
TkDebug.AssertNotNull(itemParams, string.Format(ObjectUtil.SysCulture,
"builders参数第{0}个IParamBuilder调用的Parameters返回是空，这是不允许的",
j), item);
result.Parameters.Add(itemParams);
++j;
}
//result.Sql = builder.ToString();
if (j == 0)
{
return(null);
}
else if (j == 1)
{
return(builders.First());
}
else
{
result.Sql = builder.ToString();
return(result);
}
}