public static async Task <int> BatchUpdateAsync <T>(this IQueryable <T> query, T updateValues, List <string> updateColumns = null) where T : class, new()
{
DbContext context = BatchUtil.GetDbContext(query);
List <SqlParameter> parameters = new List <SqlParameter>();
string sql = BatchUtil.GetSqlUpdate(query, context, updateValues, updateColumns, parameters);
return(await context.Database.ExecuteSqlCommandAsync(sql, parameters.ToArray()));
}
// Async methods
public static async Task <int> BatchDeleteAsync <T>(this IQueryable <T> query, CancellationToken cancellationToken = default(CancellationToken)) where T : class
{
DbContext context = BatchUtil.GetDbContext(query);
DbServer databaseType = context.Database.ProviderName.EndsWith(DbServer.Sqlite.ToString()) ? DbServer.Sqlite : DbServer.SqlServer;
(string sql, var sqlParameters) = BatchUtil.GetSqlDelete(query, context);
return(await context.Database.ExecuteSqlCommandAsync(sql, sqlParameters, cancellationToken).ConfigureAwait(false));
}
private static (DbContext, string, List <object>) GetBatchUpdateArguments <T>(IQueryable <T> query, object updateValues = null, List <string> updateColumns = null, Expression <Func <T, T> > updateExpression = null, Type type = null) where T : class
{
type ??= typeof(T);
var context = BatchUtil.GetDbContext(query);
var(sql, sqlParameters) = updateExpression == null?BatchUtil.GetSqlUpdate(query, context, type, updateValues, updateColumns)
: BatchUtil.GetSqlUpdate(query, context, type, updateExpression);
return(context, sql, sqlParameters);
}
/// <summary>
/// get Update Sql
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="query"></param>
/// <param name="expression"></param>
/// <returns></returns>
public static (string, List <object>) GetSqlUpdate <T>(IQueryable <T> query, Expression <Func <T, T> > expression) where T : class
{
DbContext context = BatchUtil.GetDbContext(query);
(string sql, string tableAlias, string tableAliasSufixAs, IEnumerable <object> innerParameters) = GetBatchSql(query, context, isUpdate: true);
var sqlColumns = new StringBuilder();
var sqlParameters = new List <object>(innerParameters);
var columnNameValueDict = TableInfo.CreateInstance(GetDbContext(query), new List <T>(), OperationType.Read, new BulkConfig()).PropertyColumnNamesDict;
CreateUpdateBody(columnNameValueDict, tableAlias, expression.Body, ref sqlColumns, ref sqlParameters);
sqlParameters = ReloadSqlParameters(context, sqlParameters); // Sqlite requires SqliteParameters
sqlColumns = (GetDatabaseType(context) == DbServer.SqlServer) ? sqlColumns : sqlColumns.Replace($"[{tableAlias}].", "");
var resultQuery = $"UPDATE {tableAlias}{tableAliasSufixAs} SET {sqlColumns} {sql}";
return(resultQuery, sqlParameters);
}
public static async Task BatchUpdateAsync <T>(this IQueryable <T> query, DbContext context, T updateValues, List <string> updateColumns = null) where T : class, new()
{
string sql = BatchUtil.GetSqlUpdate(query, context, updateValues, updateColumns);
await context.Database.ExecuteSqlCommandAsync(sql);
}
// Async methods
public static async Task BatchDeleteAsync <T>(this IQueryable <T> query, DbContext context) where T : class, new()
{
string sql = BatchUtil.GetSqlDelete(query, context);
await context.Database.ExecuteSqlCommandAsync(sql);
}
public static void BatchDelete <T>(this IQueryable <T> query, DbContext context) where T : class, new()
{
string sql = BatchUtil.GetSqlDelete(query, context);
context.Database.ExecuteSqlCommand(sql);
}
public static Task BatchInsertAsync <T>(this IQueryable query, IList <T> entities, BulkConfig bulkConfig = null, CancellationToken cancellationToken = default) where T : class
{
var context = BatchUtil.GetDbContext(query);
return(DbContextBulkTransaction.ExecuteAsync(context, entities, OperationType.Insert, bulkConfig, null, cancellationToken));
}
public static void BatchInsert <T>(this IQueryable query, IList <T> entities, BulkConfig bulkConfig = null) where T : class
{
var context = BatchUtil.GetDbContext(query);
DbContextBulkTransaction.Execute(context, entities, OperationType.Insert, bulkConfig, null);
}
