C# SqlDataAdapter.update结合事务(SqlTransaction)批量更新数据
//此处的程序功能主要是将一个库中的表数据(源表)更新到另外一个库中的表数据(目标表)
//实现目标表的数据和源表数据一致,已包括增加,更新和删除数据记录功能
//主调用代码块
SqlConnection conn = new SqlConnection("data source=.;user id=sa;password=sa;initial catalog=test");
SqlTransaction trans;
conn.Open();
trans = conn.BeginTransaction();
try
{
TransUpdateTable(ds1.Tables[0],dtto, conn, sql1, trans, "key1");
TransUpdateTable(ds2.Tables[0],dtto, conn, sql2, trans, "key2");
TransUpdateTable(ds3.Tables[0], dtto,conn, sql3, trans, "key3");
trans.Commit();
}
catch (Exception ex)
{
trans.Rollback();
Response.Write(ex.Message);
}
finally
{
conn.Close();
}
///
/// 处理数据
///
/// 源数据表
/// 连接串
/// 要更新表的查询语句
/// 事务
public void TransUpdateTable(DataTable dtfrom,DataTable dtto,SqlConnection conn, string sql, SqlTransaction trans, string key)
{
//
try
{
SqlDataAdapter da1 = new SqlDataAdapter(sql, conn);
da1.UpdateCommand = new SqlCommand("", conn, trans);
da1.InsertCommand = new SqlCommand("", conn, trans);
da1.DeleteCommand = new SqlCommand("", conn, trans);
da1.SelectCommand = new SqlCommand(sql, conn, trans);
//操作要更新的TO对象表
UpdateDataTableByTableKey(key, dtfrom, dtto);
SqlCommandBuilder sqlcmd = new SqlCommandBuilder(da1);
da1.UpdateCommand = sqlcmd.GetUpdateCommand();
da1.InsertCommand = sqlcmd.GetInsertCommand();
da1.DeleteCommand = sqlcmd.GetDeleteCommand();
da1.Update(dtto);
dtto.AcceptChanges();
}
catch { throw; }
}
///
/// 更新datatable
///
/// 表关键字
/// 源表
/// 目标表(要更新的表)
public void UpdateDataTableByTableKey(string key, DataTable dtfrom,DataTable dtto)
{
bool flag = false;
int row = -1;
for (int i = 0; i < dtfrom.Rows.Count; i++)
{
//判断是否存在记录
for (int j = 0; j < dtto.Rows.Count; j++)
{
if (dtfrom.Rows[i][key].ToString() == dtto.Rows[j][key].ToString())
{
flag = true;//标志存在记录
row = j;//记录存在行号
break;
}
}
if (flag && row >= 0)
{
//循环列
for (int m = 0; m < dtto.Columns.Count; m++)
{
//存在列则更新
string columnname = dtto.Columns[m].ColumnName;
if (dtfrom.Columns.Contains(columnname))
{
//
dtto.Rows[row][columnname] = dtfrom.Rows[i][columnname];
}
else
{
dtto.Rows[i][columnname] = null;
}
}
}
else
{
//不存在记录则新增
DataRow dr = dtto.NewRow();
//循环列
for (int m = 0; m < dtto.Columns.Count; m++)
{
//存在列则更新
string columnname = dtto.Columns[m].ColumnName;
if (dtfrom.Columns.Contains(columnname))
{
//
dr[columnname] = dtfrom.Rows[i][columnname];
}
else
{
dr[columnname] = null;
}
}
dtto.Rows.Add(dr);
}
flag = false;
row = -1;
}
//判断删除记录
for (int m = 0; m < dtto.Rows.Count; m++)
{
for (int n = 0; n < dtfrom.Rows.Count; n++)
{
if (dtfrom.Rows[n][key].ToString() == dtto.Rows[m][key].ToString())
{
flag = true;//标志存在记录
row = m;//记录存在行号
break;
}
}
if (!flag && row < 0)
{
dtto.Rows[m].Delete();
}
flag = false;
row = -1;
}
}