C#连接数据库不能存放数据

我用的C#连接SQL server数据库，数据库连接上了，测试连接也成功，
可是就是无法将数据存放进数据库的表，程序也没报错，弄了好久还是不行，
求指点一下，接触C#和数据库不久，仿照着做点设计。这个是把串口收到的数据保存到
数据库，用的是Time控件，每隔一秒存一次，求教一下大家，是怎么回事？
public string str = new ConnString().str;
private void timer2_Tick(object sender, EventArgs e)
{

        SqlConnection conn = null;
        SqlDataReader rdr = null;

        try
        {
            conn = new SqlConnection(str);
            conn.Open();
            SqlCommand cmd = new SqlCommand("jiedian1Insert", conn);
            cmd.CommandType = CommandType.StoredProcedure;

            SqlParameter pWendu1 =
                new SqlParameter("@pwendu1", SqlDbType.VarChar, 10);
            pWendu1.Direction = ParameterDirection.Input;
            pWendu1.Value = Convert.ToString(wendu1.Text);
            cmd.Parameters.Add(pWendu1);

            SqlParameter pShidu1 =
                    new SqlParameter("@pshidu1", SqlDbType.VarChar, 10);
            pShidu1.Direction = ParameterDirection.Input;
            pShidu1.Value = Convert.ToString(shidu1.Text);
            cmd.Parameters.Add(pShidu1);

            SqlParameter pGuangzhao1 =
                        new SqlParameter("@pguangzhao1", SqlDbType.VarChar, 10);
            pGuangzhao1.Direction = ParameterDirection.Input;
            pGuangzhao1.Value = Convert.ToString(guangzhao1.Text);
            cmd.Parameters.Add(pGuangzhao1);

            SqlParameter pFire1 =
                            new SqlParameter("@pfire1", SqlDbType.VarChar, 10);
            pFire1.Direction = ParameterDirection.Input;
            pFire1.Value = Convert.ToString(fire1.Text);
            cmd.Parameters.Add(pFire1);

        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
        finally
        {
            if (conn != null)
            {
                conn.Close();
            }
            if (rdr != null)
            {
                rdr.Close();
            }
        }

    }![图片说明](https://img-ask.csdn.net/upload/201708/15/1502761721_268150.png)

USE [zigbee]
GO

/****** Object: StoredProcedure [dbo].[jiedian1Insert] Script Date: 2017/8/15 9:46:06 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE PROCEDURE [dbo].[jiedian1Insert]
@pwendu1 varchar(10),
@pshidu1 varchar(10),
@pguangzhao1 varchar(10),
@pfire1 varchar(10)

AS
BEGIN
INSERT INTO jiedian1(wendu1,shidu1,guangzhao1,fire1)
VALUES(@pwendu1,@pshidu1,@pguangzhao1,@pfire1)
END

GO