SqlHelper.cs
public static class SqlHelper
{
private static readonly string conStr = ConfigurationManager.ConnectionStrings["sql"].ConnectionString; public static int ExecuteNonQuery(string sql, CommandType cmdType, params SqlParameter[] pms)
{
using (SqlConnection con = new SqlConnection(conStr))
{
using (SqlCommand cmd = new SqlCommand(sql, con))
{
cmd.CommandType = cmdType;
if (pms != null)
{
cmd.Parameters.AddRange(pms);
}
con.Open();
return cmd.ExecuteNonQuery();
}
}
} public static object ExecuteScalar(string sql, CommandType cmdType, params SqlParameter[] pms)
{
using (SqlConnection con = new SqlConnection(conStr))
{
using (SqlCommand cmd = new SqlCommand(sql, con))
{
cmd.CommandType = cmdType;
if (pms != null)
{
cmd.Parameters.AddRange(pms);
}
con.Open();
return cmd.ExecuteScalar();
}
}
} public static SqlDataReader ExecuteReader(string sql, CommandType cmdType, params SqlParameter[] pms)
{
SqlConnection con = new SqlConnection(conStr);
try
{
using (SqlCommand cmd = new SqlCommand(sql, con))
{
cmd.CommandType = cmdType;
if (pms != null)
{
cmd.Parameters.AddRange(pms);
}
con.Open();
SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return reader;
}
}
catch
{
con.Dispose();
throw;
}
} public static DataTable ExecuteDataTable(string sql, CommandType cmdType, params SqlParameter[] pms)
{
using (SqlDataAdapter sda = new SqlDataAdapter(sql, conStr))
{
DataTable dt = new DataTable(); sda.SelectCommand.CommandType = cmdType;
if (pms != null)
{
sda.SelectCommand.Parameters.AddRange(pms);
}
sda.Fill(dt);
return dt;
}
}
}
多添加搜索
#region 多条件搜索使用带参数的sql语句
StringBuilder sql = new StringBuilder("select * from PhoneNum");
List<string> wheres = new List<string>();
List<SqlParameter> listParameter = new List<SqlParameter>();
if (cboGroup.SelectedIndex != )
{
//sql.Append(" and ptypeid=" + cboGroup.Text.Split('|')[0]);
//wheres.Add(" ptypeid=" + cboGroup.Text.Split('|')[0]);
wheres.Add(" ptypeid=@typeid ");
listParameter.Add(new SqlParameter("@typeid", cboGroup.Text.Split('|')[]));
}
if (txtSearchName.Text.Trim().Length > )
{
// sql.Append(" and pname like '%" + txtSearchName.Text.Trim() + "%'");
wheres.Add(" pname like @pname ");
//pname like '%乔%'
//pname liek '%'+@pname+'%'
listParameter.Add(new SqlParameter("@pname", "%" + txtSearchName.Text.Trim() + "%"));
}
if (txtSearchCellPhone.Text.Trim().Length > )
{
//sql.Append(" and pcellphone like '%" + txtSearchCellPhone.Text.Trim() + "%'");
//wheres.Add(" pcellphone like '%" + txtSearchCellPhone.Text.Trim() + "%'");
wheres.Add(" pcellphone like @cellphone ");
listParameter.Add(new SqlParameter("@cellphone", "%" + txtSearchCellPhone.Text.Trim() + "%"));
}
//判断用户是否选择了条件
if (wheres.Count > )
{
string wh = string.Join(" and ", wheres.ToArray());
sql.Append(" where " + wh);
}
SqlHelper.ExecuteDataTable(sql.ToString(), listParameter.ToArray());
#endregion