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C#获得SQLServer服务器名、数据库名、表名、以及字段名

using System.Data.SqlClient;

/// <summary>
/// 获取局域网内的所有数据库服务器名称
/// </summary>
/// <returns>服务器名称数组</returns>
public List<string> GetSqlServerNames()
{
DataTable dataSources = SqlClientFactory.Instance.CreateDataSourceEnumerator().GetDataSources();

DataColumn column = dataSources.Columns["InstanceName"];
DataColumn column2 = dataSources.Columns["ServerName"];

DataRowCollection rows = dataSources.Rows;
List<string> Serverlist = new List<string>();
string array = string.Empty;
for (int i = 0; i < rows.Count; i++)
{
string str2 = rows[i][column2] as string;
string str = rows[i][column] as string;
if (((str == null) || (str.Length == 0)) || ("MSSQLSERVER" == str))
{
array = str2;
}
else
{
array = str2 + @"/" + str;
}

Serverlist.Add(array);
}

Serverlist.Sort();

return Serverlist;
}

/// <summary>
/// 查询sql中的非系统库
/// </summary>
/// <param name="connection"></param>
/// <returns></returns>
public List<string> databaseList(string connection)
{
List<string> getCataList = new List<string>();
string cmdStirng = "select name from sys.databases where database_id > 4";
SqlConnection connect = new SqlConnection(connection);
SqlCommand cmd = new SqlCommand(cmdStirng, connect);
try
{
if (connect.State == ConnectionState.Closed)
{
connect.Open();
IDataReader dr = cmd.ExecuteReader();
getCataList.Clear();
while (dr.Read())
{
getCataList.Add(dr["name"].ToString());
}
dr.Close();
}

}
catch (SqlException e)
{
//MessageBox.Show(e.Message);
}
finally
{
if (connect != null && connect.State == ConnectionState.Open)
{
connect.Dispose();
}
}
return getCataList;
}

/// <summary>
/// 获取列名
/// </summary>
/// <param name="connection"></param>
/// <returns></returns>
public List<string> GetTables(string connection)
{
List<string> tablelist = new List<string>();
SqlConnection objConnetion = new SqlConnection(connection);
try
{
if (objConnetion.State == ConnectionState.Closed)
{
objConnetion.Open();
DataTable objTable = objConnetion.GetSchema("Tables");
foreach (DataRow row in objTable.Rows)
{
tablelist.Add(row[2].ToString());
}
}
}
catch
{

}
finally
{
if (objConnetion != null && objConnetion.State == ConnectionState.Closed)
{
objConnetion.Dispose();
}

}
return tablelist;
}

/// <summary>
/// 获取字段
/// </summary>
/// <param name="connection"></param>
/// <param name="TableName"></param>
/// <returns></returns>
public List<string> GetColumnField(string connection, string TableName)
{
List<string> Columnlist = new List<string>();
SqlConnection objConnetion = new SqlConnection(connection);
try
{
if (objConnetion.State == ConnectionState.Closed)
{
objConnetion.Open();
}

SqlCommand cmd = new SqlCommand("Select Name FROM SysColumns Where id=Object_Id('" + TableName + "')", objConnetion);
SqlDataReader objReader = cmd.ExecuteReader();

while (objReader.Read())
{
Columnlist.Add(objReader[0].ToString());

}
}
catch
{

}
objConnetion.Close();
return Columnlist;
}

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