这个代码是将数据检索到文本框的核心 [英] is this code is corerct to retrive the data into text box

问题描述

public string user(AddInfoModel info)
        {
             SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConsString"].ConnectionString);
             con.Open();
             SqlCommand cmd = new SqlCommand("Resource_sp", con);
             cmd.CommandType = CommandType.StoredProcedure;
             SqlDataReader reader = cmd.ExecuteReader();
             if (reader.Read())
                {

                    FirstName.Text = reader["FirstName"].ToString();
                    LastName.Text = reader["LastName"].ToString();
                    reader.Close();

                    con.Close();
                }
            }
        }
    }

推荐答案

如果你得到多行，那么你需要注意你正在重写文本框。这不正确，因为只显示最后一行中的值。使用 Datagrid 或列表框而不是文本框。

If you are getting multiple rows, then you need to note that you are rewriting into the textbox. This is not correct as only the values in the last row would be displayed. Use a Datagrid or a Listbox instead of a textbox.

使用阅读器.close（）和con.close（）在if条件之外



公共字符串用户（AddInfoModel info）

{

SqlConnection con = new SqlConnection（ConfigurationManager.ConnectionStrings [MyConsString]。ConnectionString）;

con.Open（）;

SqlCommand cmd = new SqlCommand（ Resource_sp，con）;

cmd.CommandType = CommandType.StoredProcedure;

SqlDataReader reader = cmd.ExecuteReader（）;

if（ reader.Read（））

{



FirstName.Text = reader [FirstName]。ToString（）;

LastName.Text = reader [LastName]。ToString（）;



}

reader.Close（）;

con.Close（）;



}

}

}

use reader.close() and con.close() outside the if condition

public string user(AddInfoModel info)
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConsString"].ConnectionString);
con.Open();
SqlCommand cmd = new SqlCommand("Resource_sp", con);
cmd.CommandType = CommandType.StoredProcedure;
SqlDataReader reader = cmd.ExecuteReader();
if (reader.Read())
{

FirstName.Text = reader["FirstName"].ToString();
LastName.Text = reader["LastName"].ToString();

}
reader.Close();
con.Close();

}
}
}

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