C# SqlParameterCollection仅接受非空的SqlParameter类型对象，而不接受IDbDataParameter[]对象

我有一种将数据插入数据库的方法： 更新前

public DataSet Get(WorkEntry t, string callingPage, string operation)
{ 
    // Start the Insert Update Method
    IDbDataParameter[] param = null;

    DataSet returnValue = null;

    try
    {
        param = CreateParams(t, callingPage, operation);

        param[0].Value = t.AutoID;
        param[1].Value = t.OperatorName;
        param[2].Value = t.Date;
        param[3].Value = t.StartDate;
        param[4].Value = t.EndDate;

        SqlConnection sqlConnection = new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"].ToString());
        sqlConnection.Open();
        SqlCommand command = sqlConnection.CreateCommand();
        command.CommandType = System.Data.CommandType.StoredProcedure;
        command.CommandText = "spWorkEntry";
        command.Parameters.Add(param);

        da_G = new SqlDataAdapter(command);
        cmdB_G = new SqlCommandBuilder(da_G);
        da_G.Fill(returnValue);

        return returnValue;
    }
    catch (Exception ex)
    {
        throw ex;
    }
    finally
    {
        param = null;
        command.Parameters.Clear();
    }
}// End the Insert Update Method

 // Get-----------------------------------------------------------------------------------------
        public DataSet Get(WorkEntry t, string callingPage, string operation)
        { // Start the Insert Update Method
            SqlParameter[] param = null;
            DataSet returnValue = null;
            try
            {
                param = (SqlParameter[])CreateParams(t, callingPage, operation);

                param[0].Value = t.AutoID;
                param[1].Value = "sdf";
                param[2].Value = t.Date;
                param[3].Value = t.StartDate;
                param[4].Value = t.EndDate;


                SqlConnection sqlConnection = new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"].ToString());
                sqlConnection.Open();
                SqlCommand command = sqlConnection.CreateCommand();
                command.CommandType = System.Data.CommandType.StoredProcedure;
                command.CommandText = "spWorkEntry";
                command.Parameters.Add(param);

                da_G = new SqlDataAdapter(command);
                cmdB_G = new SqlCommandBuilder(da_G);
                da_G.Fill(returnValue);

                return returnValue;

            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                param = null;
                command.Parameters.Clear();

            }
        }// End the Insert Update Method
        // Get End -----------------------------------------------------------------------------------------

----------------------------------- 更新后

public DataSet Get(WorkEntry t, string callingPage, string operation)
{ 
    // Start the Insert Update Method
    IDbDataParameter[] param = null;

    DataSet returnValue = null;

    try
    {
        param = CreateParams(t, callingPage, operation);

        param[0].Value = t.AutoID;
        param[1].Value = t.OperatorName;
        param[2].Value = t.Date;
        param[3].Value = t.StartDate;
        param[4].Value = t.EndDate;

        SqlConnection sqlConnection = new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"].ToString());
        sqlConnection.Open();
        SqlCommand command = sqlConnection.CreateCommand();
        command.CommandType = System.Data.CommandType.StoredProcedure;
        command.CommandText = "spWorkEntry";
        command.Parameters.Add(param);

        da_G = new SqlDataAdapter(command);
        cmdB_G = new SqlCommandBuilder(da_G);
        da_G.Fill(returnValue);

        return returnValue;
    }
    catch (Exception ex)
    {
        throw ex;
    }
    finally
    {
        param = null;
        command.Parameters.Clear();
    }
}// End the Insert Update Method

 // Get-----------------------------------------------------------------------------------------
        public DataSet Get(WorkEntry t, string callingPage, string operation)
        { // Start the Insert Update Method
            SqlParameter[] param = null;
            DataSet returnValue = null;
            try
            {
                param = (SqlParameter[])CreateParams(t, callingPage, operation);

                param[0].Value = t.AutoID;
                param[1].Value = "sdf";
                param[2].Value = t.Date;
                param[3].Value = t.StartDate;
                param[4].Value = t.EndDate;


                SqlConnection sqlConnection = new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"].ToString());
                sqlConnection.Open();
                SqlCommand command = sqlConnection.CreateCommand();
                command.CommandType = System.Data.CommandType.StoredProcedure;
                command.CommandText = "spWorkEntry";
                command.Parameters.Add(param);

                da_G = new SqlDataAdapter(command);
                cmdB_G = new SqlCommandBuilder(da_G);
                da_G.Fill(returnValue);

                return returnValue;

            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                param = null;
                command.Parameters.Clear();

            }
        }// End the Insert Update Method
        // Get End -----------------------------------------------------------------------------------------

此行上发生错误：

command.Parameters.Add(param); 

Param是

IDbDataParameter[]

的数组&数组中的值如下所示：

param[0].Value = 123;
param[1].Value = "asdf";
param[2].Value = "sdfs";
param[3].Value = "sdfsdf";
param[4].Value = "sdfsdf";

---

然后错误也会发生，因为param应该不可为null。

没有将数组作为参数的

Add（）

重载。这种编译的唯一原因是因为存在一个重载，它接受一个

对象

。quick将显示一个

AddRange

方法，该方法将接受

SqlParameter

数组。因此，您应该将数组类型设置为

SqlParameter[]

，而不是

IDBDataParameter[]

，或者在有其他代码使用它并依赖该接口时强制转换它

更改了你告诉我的代码，然后也出现了相同的错误，请检查更新的代码question@HardikParmar，

AddRange（）

，而不是

Add（）

。当类型可以接受数组时，这是.Net中的常见模式-查找

AddRange

方法。