Question

我正在使用企业库

开发一个sql项目

        public void InsertTotalOrdersIntoYearlyTable(int val, double emSal)
        {
           DbCommand cmd = db.GetSqlStringCommand("INSERT INTO Table1 (TotalValue,TotalSalary) VALUES (@val, @emSal)");
           db.AddInParameter(cmd, "val", DbType.Int32, val);
           db.AddInParameter(cmd, "emSal", DbType.Double, emSal);
        }

现在我必须通过一些操作插入到另一个表中并且我正在创建另一个方法，所以我想将表作为参数发送到方法，所以我没有重复该方法。这可以做到吗？ / p>

Answer 1

听起来你正试图进行一次方法调用，将数据从c＃插入到SQL中。您可以在SQL中使用用户定义的表类型来实现此目的。

这是SQL用户定义表

CREATE TYPE [dbo].[udt_Table] AS TABLE(
       [TotalValue] [int] NOT NULL,
       [TotalSalary] [Double] NOT NULL
       PRIMARY KEY CLUSTERED 
(
       [TotalValue] ASC,
       [TotalSalary] ASC
)WITH (IGNORE_DUP_KEY = OFF)
)
GO

现在是一个使用用户定义的表类型的存储过程。

CREATE PROCEDURE [dbo].[usp_table_insert]
       @UdtTableIn dbo.udt_Table ReadOnly
AS
BEGIN
       SET NOCOUNT ON;

       insert into table Table1 ( TotalValue, TotalSalary)
       values ( source.TotalValue, source.TotalSalary);

END

现在可以拨打一个C＃（ado）代码。

/// <summary>
        /// Processes the counts from the float file, and adds the values to the database.
        /// </summary>
        /// <param name="valuesToBeInserted">
        /// The count of the accounts in the Float file that was parsed.
        /// </param>            
    public void ProcessCountResults(Dictionary<long, int> valuesToBeInserted)
    {
        // Creating a data table and adding the columns with their names and types.
        var resultsDataTable = new DataTable();
        resultsDataTable.Columns.Add("TotalValue", typeof(int));
        resultsDataTable.Columns.Add("TotalSalary", typeof(long));

        foreach (var values in valuesToBeInserted)
        {
            // Creating and then adding data to the data row.
            var dataRow = resultsDataTable.NewRow();

            // Adding the primary key values first.
            dataRow["TotalValue"] = values.Key;
            dataRow["TotalSalary"] = values.Value;

            // Adding the row to the data table.
            resultsDataTable.Rows.Add(dataRow);
        }

        // Calling the method to insert the data table into the SQL database.
        this.InsertDataTableIntoSqlDatabase(resultsDataTable, "dbo.usp_table_insert", "@CorpUpld_UDT");
    }

    /// <summary>
    /// Inserts a data table into a SQL database.
    /// </summary>
    /// <param name="dataTable"> 
    /// The data table to be inserted 
    /// </param>
    /// <param name="spCommand"> 
    /// The string name of the stored procedure command to be executed. 
    /// </param>
    /// <param name="parameterName"> 
    /// The name of the parameter to be used. 
    /// </param>
    private void InsertDataTableIntoSqlDatabase(DataTable dataTable, string spCommand, string parameterName)
    {
        using (var connection = (SqlConnection)this.connectionManager.AcquireConnection(this.scriptObjectModelTransaction))
        {
            using (var command = new SqlCommand(spCommand, connection))
            {
                // Specify the command as a stored procedure.
                command.CommandType = CommandType.StoredProcedure;

                // Adding the parameter with values to the stored procedure call.           
       command.Parameters.AddWithValue(parameterName, dataTable);

                    // Executing the stored procedure.
                    command.ExecuteNonQuery();
                }
            }
        }
    }

请记住，我正在使用ProcessCountResults方法的字典。您可以将其更改为您想要的任何内容。关键是你需要填写一个c＃dataTable，它将作为存储过程参数传递。只需确保您的c＃dataTable与用户定义的表类型匹配。

我们可以将表作为参数传递给企业库吗？

1 个答案: