如何将 Byte[] 插入 SQL Server VARBINARY 列

2021-11-18 00:00:00 arrays sql-server

我在下面突出显示了一个字节数组，如何将其插入到 SQL Server 数据库的 Varbinary 列中?

I have a byte array highlighted below, how do I insert it into a SQL Server database Varbinary column?

byte[] arraytoinsert = new byte[10]{0,1,2,3,4,5,6,7,8,9};

string sql = 
    string.format
    (
    "INSERT INTO mssqltable (varbinarycolumn) VALUES ({0});",WHATTODOHERE
    );

推荐答案

我的解决方案是使用参数化查询，因为连接对象负责正确格式化数据(包括确保正确的数据类型，以及转义危险"字符(如适用):

My solution would be to use a parameterised query, as the connectivity objects take care of formatting the data correctly (including ensuring the correct data-type, and escaping "dangerous" characters where applicable):

// Assuming "conn" is an open SqlConnection
using(SqlCommand cmd = new SqlCommand("INSERT INTO mssqltable(varbinarycolumn) VALUES (@binaryValue)", conn))
{
    // Replace 8000, below, with the correct size of the field
    cmd.Parameters.Add("@binaryValue", SqlDbType.VarBinary, 8000).Value = arraytoinsert;
    cmd.ExecuteNonQuery();
}

添加了约翰桑德斯建议的包装使用"语句，以在完成后正确处理 SqlCommand

Added the wrapping "using" statement as suggested by John Saunders to correctly dispose of the SqlCommand after it is finished with

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