10分帮我改个错。。。。。
public void dropbind1()
{
SqlConnection myConnection = new SqlConnection(myConnectionString);
if (Convert.ToInt32(Session[ "login_power "]) == 1)
{
string sql = "select * from gw_address where addressname=…… ";
}
else
{
string sql = "select * from gw_address ";
}
SqlDataAdapter custDA = new SqlDataAdapter(sql, myConnection);
DataSet custDS = new DataSet();
custDA.Fill(custDS);
DropDownListaddress.DataSource = custDS.Tables[0];
DropDownListaddress.DataTextField = "addressname ";
DropDownListaddress.DataValueField = "addressid ";
DropDownListaddress.DataBind();
this.DropDownListaddress.Items.Insert(0, new ListItem( "请选择地区 ", "-1 "));
}

为什么这么写。
我string 的sql没有用？
提示我：当前上下文中不存在名称“sql”
怎么连找都找不到？？？？？？？？？？？？？？？？？？？？？
错在哪？？？？？


[解决办法]
if (Convert.ToInt32(Session[ "login_power "]) == 1)
{
string sql = "select * from gw_address where addressname=…… ";
}
else
{
string sql = "select * from gw_address ";
}

--------------------------------------------
string sql = "select * from gw_address ";

if (Convert.ToInt32(Session[ "login_power "]) == 1)
{
sql = "select * from gw_address where addressname=…… ";
}

[解决办法]
请翻书理解 变量作用域

if (Convert.ToInt32(Session[ "login_power "]) == 1)
{
string sql = "select * from gw_address where addressname=…… ";
}
else
{
string sql = "select * from gw_address ";
}

> > > >

string sql = null;
if (Convert.ToInt32(Session[ "login_power "]) == 1)
{
sql = "select * from gw_address where addressname=…… ";
}
else
{
sql = "select * from gw_address ";
}
------解决方案--------------------

string sql= " ";
if()
{
sql = "..... "
}
else
{
sql= "..... "
}
SqlDataAdapter custDA = new SqlDataAdapter(sql, myConnection);
就可以了