SQL通过传递参数方式备份数据库.

存储过程的SQL代码:

ALTER PROCEDURE USP_DBBackup
    @BackPath nvarchar(100),    --存储目录.
    @BackName nvarchar(50)    --存储数据库名.
AS
      SET NOCOUNT ON 

      declare @name nvarchar(4000)
      select @name = rtrim(ltrim(@name))

      if exists (SELECT Name FROM Master..SysDatabases where name = 'PersonnelManagementSystem')    --寻找指定的数据库.
        set @name= 'PersonnelManagementSystem'

      declare @outpath nvarchar(4000)
      select @outpath = @BackPath +'\'+ @BackName    --拼接总路径.

    backup database @name to disk= @outpath

Winform中调用存储过程的C#代码:

//备份.
        private void btnBackConfirm_Click(object sender, EventArgs e) {
            string strConn = @"Data Source=.\SQLExpress;Initial Catalog=PersonnelManagementSystem;Integrated Security=True";
            using(SqlConnection connect = new SqlConnection(strConn)) {
                connect.Open();
                using(SqlCommand cmd = connect.CreateCommand()) {
                    cmd.CommandText = "USP_DBBackup";
                    cmd.Parameters.Clear();
                    cmd.Parameters.Add("@BackPath", SqlDbType.NVarChar, ).Value = txtBackPath.Text.Trim();   //存储路径.
                    cmd.Parameters.Add("@BackName", SqlDbType.NVarChar, ).Value = txtBackNewDBName.Text.Trim();  //存储数据库名.
                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.ExecuteNonQuery();
                }
            }
            MessageBox.Show("Done!");
        }