DataSet中怎么截取表里的字符

bulls5988 2012-09-14 04:39:55

要把 car_fee_hostname 字段的头两个字符显示比如:“二楼收费亭—入场”、“负二停车场—出场”就显示为：“二楼”、“负二”

现在这样写的话

string place_class_sql = "select DISTINCT stringsub(car_fee_hostname,1,2) FROM car_park_fee where car_fee_flag = 2";现在报错"dl_fee_place.DisplayMember = "car_fee_hostname";"

报错



string place_class_sql = "select DISTINCT car_fee_hostname FROM car_park_fee where car_fee_flag = 2";

SqlConnection place_conn = new SqlConnection(fee_conn.sql_conn());

DataSet complace = new DataSet();

place_conn.Open();

SqlDataAdapter myplace = new SqlDataAdapter(place_class_sql, class_conn);

myplace.Fill(complace, "ds");

place_conn.Close();

DataRow dw = complace.Tables[0].NewRow();

dw["car_fee_hostname"] = "全部收费口";

complace.Tables[0].Rows.InsertAt(dw,0);

dl_fee_place.DisplayMember = "car_fee_hostname";

this.dl_fee_place.DataSource = complace.Tables[0];

dl_fee_place.SelectedIndex = 0;

...全文

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特别 2012-09-14

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select DISTINCT stringsub(car_fee_hostname,1,2) FROM car_park_f
换成
select DISTINCT stringsub(car_fee_hostname,1,2) as car_fee_hostname FROM car_park_f

人生难得一只鸡 2012-09-14

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select DISTINCT stringsub(car_fee_hostname,1,2)

=》

select distinct SUBSTRING(car_fee_hostname,1,3) as car_fee_hostname from

csdn_风中雪狼 2012-09-14

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string place_class_sql = "select DISTINCT stringsub(car_fee_hostname,1,2) FROM car_park_fee where car_fee_flag = 2";现在报错"dl_fee_place.DisplayMember = "car_fee_hostname";" 找不到
===> car_fee_hostname 列名是不是写错了？

csdn_风中雪狼 2012-09-14