DatabaseUtils.BlobFileDescriptorForQuery Method
Definition
Important
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Overloads
| Name | Description |
|---|---|
| BlobFileDescriptorForQuery(SQLiteStatement, String[]) |
Utility method to run the pre-compiled query and return the blob value in the first column of the first row. |
| BlobFileDescriptorForQuery(SQLiteDatabase, String, String[]) |
Utility method to run the query on the db and return the blob value in the first column of the first row. |
BlobFileDescriptorForQuery(SQLiteStatement, String[])
Utility method to run the pre-compiled query and return the blob value in the first column of the first row.
[Android.Runtime.Register("blobFileDescriptorForQuery", "(Landroid/database/sqlite/SQLiteStatement;[Ljava/lang/String;)Landroid/os/ParcelFileDescriptor;", "")]
public static Android.OS.ParcelFileDescriptor? BlobFileDescriptorForQuery(Android.Database.Sqlite.SQLiteStatement? prog, string[]? selectionArgs);[<Android.Runtime.Register("blobFileDescriptorForQuery", "(Landroid/database/sqlite/SQLiteStatement;[Ljava/lang/String;)Landroid/os/ParcelFileDescriptor;", "")>]
static member BlobFileDescriptorForQuery : Android.Database.Sqlite.SQLiteStatement * string[] -> Android.OS.ParcelFileDescriptorParameters
- prog
- SQLiteStatement
The compiled query to execute. The caller retains responsibility for closing the statement.
- selectionArgs
- String[]
Values to bind as strings in parameter order, or null to leave existing bindings unchanged. Array elements must not be null.
Returns
A read-only file descriptor for a copy of the blob value.
- Attributes
Remarks
Utility method to run the pre-compiled query and return the blob value in the first column of the first row.
The caller must close the returned file descriptor. The result can be null if the value is null or cannot be read. A query with no rows throws SQLiteDoneException.
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.
Applies to
BlobFileDescriptorForQuery(SQLiteDatabase, String, String[])
Utility method to run the query on the db and return the blob value in the first column of the first row.
[Android.Runtime.Register("blobFileDescriptorForQuery", "(Landroid/database/sqlite/SQLiteDatabase;Ljava/lang/String;[Ljava/lang/String;)Landroid/os/ParcelFileDescriptor;", "")]
public static Android.OS.ParcelFileDescriptor? BlobFileDescriptorForQuery(Android.Database.Sqlite.SQLiteDatabase? db, string? query, string[]? selectionArgs);[<Android.Runtime.Register("blobFileDescriptorForQuery", "(Landroid/database/sqlite/SQLiteDatabase;Ljava/lang/String;[Ljava/lang/String;)Landroid/os/ParcelFileDescriptor;", "")>]
static member BlobFileDescriptorForQuery : Android.Database.Sqlite.SQLiteDatabase * string * string[] -> Android.OS.ParcelFileDescriptorParameters
The database on which to execute the query. The database is not closed by this method.
- query
- String
The SQL query whose first row and first column supply the BLOB value.
- selectionArgs
- String[]
Values to bind as strings in parameter order, or null if no values are supplied. Array elements must not be null.
Returns
A read-only file descriptor for a copy of the blob value.
- Attributes
Remarks
Utility method to run the query on the db and return the blob value in the first column of the first row.
The temporary query statement is closed before this method returns. The caller must close the returned file descriptor. The result can be null if the value is null or cannot be read. A query with no rows throws SQLiteDoneException.
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.