SQL 当你有 GUID (UniqueIdentifier) 列时在 C# 中批量插入

Question

我需要将数据从一个 table 复制到另一个 table。我收到一条异常消息：

The given value of type String from the data source cannot be converted to type uniqueidentifier of the specified target column",

因为我有 GUID 数据类型的列。

我的代码...

using (SqlConnection destinationConn = new SqlConnection("Data Source = ''; Initial Catalog = ''; Persist Security Info = True; User ID = ''; Password = ''; MultipleActiveResultSets = true"))
            {
                using (SqlBulkCopy bc = new SqlBulkCopy(destinationConn))
                {
                    bc.DestinationTableName = "Animal";

                    destinationConn.Open();

                    bc.ColumnMappings.Add("guid", "guid"); //UniqueIdentifier
                    bc.ColumnMappings.Add("Name", "Name");
                    bc.WriteToServer(dt);  //DATA TABLE object


                }
            }

我该如何解决这个问题？

Answer 1

我遇到了类似的问题，用下面的代码解决了。

                DataTable dt = new DataTable();
                dt.Columns.Add("IdColumn1", typeof(Guid));
                dt.Columns.Add("IdColumn2", typeof(Guid));
                foreach (var item in MyCollection)
                    dt.Rows.Add(item.obj1, item.obj2);

                using (SqlConnection con = new SqlConnection(ConnectionString))
                {
                    con.Open();

                    using (var bulkCopy = new SqlBulkCopy(con))
                    {
                        bulkCopy.DestinationTableName = "TableName";
                        bulkCopy.ColumnMappings.Add("IdColumn1", "IdColumn1");
                        bulkCopy.ColumnMappings.Add("IdColumn2", "IdColumn2");
                        bulkCopy.WriteToServer(dt);
                    }
                    dt.Dispose();
                }

SQL 当你有 GUID (UniqueIdentifier) 列时在 C# 中批量插入

SQL Bulk Insert in C# when you have GUID (UniqueIdentifier) Column

c#

sql-server

sqlbulkcopy