ErrLookup › DapperLib/Dapper
DapperLib/Dapper
Dapper - a simple object mapper for .Net · C# · 64 source files
Analyzed at 72a54c475f on 2026-08-13. 32 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| connection | exception | error | argument-null, bulk-copy, dapper-providertools |
| type | exception | error | argument-null, type-map, reflection |
| If specifying IsFixedLength, a Length must also be specifie | exception | error | dbstring, parameter-binding, configuration |
| type | exception | error | argument-null, type-map, materialization |
| Property setting not found for: {name} | exception | error | type-map, reflection, setter, materialization |
| Constructor parameter not found for {name} | exception | error | type-map, constructor-binding, column-mapping, materialization |
| Attempting to cast a DBNull to a non nullable type! Note tha | exception | error | dynamic-parameters, nullable, dbnull, output-parameters |
| Expression must be a property/field chain off of a(n) {typeo | exception | error | dynamic-parameters, expression-trees, output-parameters |
| columnName | exception | error | argument-null, member-map, internal |
| type | exception | error | argument-null, async, query, reflection |
| Async operations require use of a DbConnection or an already | exception | error | async, connection, invalid-operation, ado-net |
| Async operations require use of a DbConnection or an IDbConn | exception | error | async, connection, command, invalid-operation, ado-net |
| you must provide at least one type to deserialize | exception | error | argument, async, multi-mapping, query |
| key | exception | error | argument-null, dapper-row, dictionary, dynamic |
| An item with the same key has already been added | exception | error | dapper, dapperrow, dictionary, duplicate-key, argumentexception |
| type | exception | error | dapper, gridreader, async, argumentnullexception, type-resolution |
| This operation requires an identity or a connected command | exception | error | dapper, gridreader, identity, invalidoperationexception, connection-lifecycle |
| type | exception | error | dapper, gridreader, argumentnullexception, type-resolution |
| The reader has been disposed; this can happen after all data | exception | error | dapper, gridreader, objectdisposedexception, lifecycle, using-scope |
| The member {name} of type {type.FullName} cannot be used as | exception | error | dapper, parameters, typehandler, notsupportedexception, mapping |
| you must provide at least one type to deserialize | exception | error | dapper, multimap, argument, validation |
| An enumerable sequence of parameters (arrays, lists, etc) is | exception | error | dapper, parameters, multiexec, argument |
| When passing parameters by position, each parameter can only | exception | error | dapper, pseudo-positional, parameters, snowflake |
| A single-character was expected | exception | error | dapper, char, type-conversion, materialization |
| The first item in a list-expansion cannot be null | exception | error | dapper, in-expansion, list, null, parameters |
| The type '{value.GetType().Name}' is not supported for SQL l | exception | error | dapper, literals, type-conversion, security |
| ValueTuple should not be used for parameters - the language- | exception | error | dapper, valuetuple, parameters, reflection |
| MultiExec is not supported by ExecuteReader | exception | error | dapper, executereader, multiexec, parameters |
| The Rest field of a ValueTuple must contain a nested ValueTu | exception | error | dapper, valuetuple, materialization, il-generation |
| A parameterless default constructor or one matching signatur | exception | error | dapper, materialization, constructor, typemap |
| Member '{name}' is an {nameof(ICustomQueryParameter)} and ca | exception | error | dapper, dbstring, icustomqueryparameter, null, parameters |
| Cannot be null or empty | exception | error | dapper, udt, typehandler, argument, validation |