ErrLookup › DapperLib/Dapper
DapperLib/Dapper
Dapper - a simple object mapper for .Net · C# · 64 source files
Analyzed at 72a54c475f on 2026-08-13. 27 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| Expression must be a property/field chain off of a(n) | exception | error | dynamic-parameters, expression-trees, output-parameters |
| The type ' ' is not supported for SQL literals. | exception | error | dapper, literals, type-conversion, security |
| An enumerable sequence of parameters (arrays, lists, etc)… | exception | error | dapper, parameters, multiexec, argument |
| When passing parameters by position, each parameter can… | exception | error | dapper, pseudo-positional, parameters, snowflake |
| Async operations require use of a DbConnection or an… | exception | error | async, connection, invalid-operation, ado-net |
| Attempting to cast a DBNull to a non nullable type! Note… | exception | error | dynamic-parameters, nullable, dbnull, output-parameters |
| Async operations require use of a DbConnection or an… | exception | error | async, connection, command, invalid-operation, ado-net |
| ValueTuple should not be used for parameters - the… | exception | error | dapper, valuetuple, parameters, reflection |
| The Rest field of a ValueTuple must contain a nested… | exception | error | dapper, valuetuple, materialization, il-generation |
| you must provide at least one type to deserialize | exception | error | dapper, multimap, argument, validation |
| Member ' ' is an and cannot be null | exception | error | dapper, dbstring, icustomqueryparameter, null, parameters |
| A parameterless default constructor or one matching… | exception | error | dapper, materialization, constructor, typemap |
| An item with the same key has already been added | exception | error | dapper, dapperrow, dictionary, duplicate-key, argumentexception |
| Property setting not found for | exception | error | type-map, reflection, setter, materialization |
| connection | exception | error | argument-null, bulk-copy, dapper-providertools |
| Constructor parameter not found for | exception | error | type-map, constructor-binding, column-mapping, materialization |
| The member of type cannot be used as a parameter value | exception | error | dapper, parameters, typehandler, notsupportedexception, mapping |
| The first item in a list-expansion cannot be null | exception | error | dapper, in-expansion, list, null, parameters |
| MultiExec is not supported by ExecuteReader | exception | error | dapper, executereader, multiexec, parameters |
| key | exception | error | argument-null, dapper-row, dictionary, dynamic |
| This operation requires an identity or a connected command | exception | error | dapper, gridreader, identity, invalidoperationexception, connection-lifecycle |
| Cannot be null or empty | exception | error | dapper, udt, typehandler, argument, validation |
| type | exception | error | dapper, gridreader, async, argumentnullexception, type-resolution |
| If specifying IsFixedLength, a Length must also be… | exception | error | dbstring, parameter-binding, configuration |
| A single-character was expected | exception | error | dapper, char, type-conversion, materialization |
| The reader has been disposed; this can happen after all… | exception | error | dapper, gridreader, objectdisposedexception, lifecycle, using-scope |
| columnName | exception | error | argument-null, member-map, internal |