Question

我正在使用数据表从Ldap获取Userdetails到数据库。

处理器内存在执行下面的代码时不断增加，最后我得到“内存异常错误”。

DirectoryEntry entry = new DirectoryEntry("LDAP://" + domainName, userName, passwd, AuthenticationTypes.Secure);
DirectorySearcher dSearch = new DirectorySearcher(entry);
dSearch.PageSize = 1000;
dSearch.Filter = "(objectClass=*)";
dSearch.SearchScope = SearchScope.Subtree;
SearchResultCollection src = dSearch.FindAll();
int i = 0;
DataTable dt = new DataTable();
dt.Columns.Add("mail");
foreach (SearchResult sResultSet in src)
{
 DataRow dr = dt.NewRow();
 if (GetProperty(sResultSet, "mail") != "")
 {
   dr["mail"] = GetProperty(sResultSet, "mail").ToString();
 }
 dt.Rows.Add(dr);
 i++;
 if (i == 1000)
 {
  BulkInsertDataTable("TestTable", dt, 2);
  dt.Dispose();
  dt = new DataTable();
  dt.Columns.Add("mail");
  i = 0;
 }
}

任何人都可以告诉我在每次批量插入数据库后如何释放内存？

先谢谢。

Answer 1

您的代码仅在索引1000处理一次数据表。从

更改行

if (i == 1000)

到

if ((i % 1000) == 0)

// you should also call BulkInsertDataTable("TestTable", dt, 2); after the foreach loop to insert the last set of data as well

Answer 2

public bool BulkInsertDataTable(string tableName, DataTable dataTable, int Mode)
    {
        bool isSuccuss = false;
        try
        {
            if (Mode == 2)
            {
                SqlConnectionObj.Open();
                SqlBulkCopy bulkCopy = new SqlBulkCopy(SqlConnectionObj, SqlBulkCopyOptions.TableLock |             SqlBulkCopyOptions.FireTriggers | SqlBulkCopyOptions.UseInternalTransaction, null);
                bulkCopy.DestinationTableName = tableName;
                bulkCopy.WriteToServer(dataTable);
                SqlConnectionObj.Close();
                isSuccuss = true;
            }

        }
        catch (Exception ex)
        {
            isSuccuss = false;
            throw ex;
        }

        return isSuccuss;

    }

从LDAP查询时由于大量搜索结果导致内存泄漏

2 个答案: