Question

我有一个查询从文本框搜索数据库。我的问题是如何逐列将搜索结果插入到分隔的文本框中，我的意思是每列都转到一个文本框。

private void searchbtn_Click(object sender, EventArgs e)
{
     SqlCeConnection con = new SqlCeConnection(@"Data Source=C:\Users\hry\Documents\Visual Studio 2010\Projects\Kargozini\Kargozini\khadamat.sdf");

     try
     {
         con.Open();
         string SearchQuerry = "SELECT ID, radif, Name, Type, Description, Price FROM Users WHERE ID = '"+searchtxt.Text+"'" ;
         SqlCeCommand com = new SqlCeCommand(SearchQuerry,con);
         com.ExecuteNonQuery();
         con.Close();
     }
     catch (SqlCeException ex)
     {
         MessageBox.Show(ex.Message);
     }
}

Answer 1

试试这个：

private void searchbtn_Click(object sender, EventArgs e)
{
        SqlConnection sql = new SqlConnection("Your String Connection");
        SqlDataAdapter adapter = new SqlDataAdapter(@"Select Name, FileName From Table Where Name Like @Name", sql); 
        adapter.SelectCommand.Parameters.AddWithValue("@Name", string.Format("%{0}%", textBox1.Text));
}

Answer 2

我认为，您的搜索只返回一行。您可以使用datareader来实现这一目标。我用下面的代码修改了你的函数：

private void searchbtn_Click(object sender, EventArgs e)
{
     SqlCeConnection con = new SqlCeConnection(@"Data Source=C:\Users\hry\Documents\Visual Studio 2010\Projects\Kargozini\Kargozini\khadamat.sdf");

     try
     {
         con.Open();
         string SearchQuerry = "SELECT ID, radif, Name, Type, Description, Price FROM Users WHERE ID = '"+searchtxt.Text+"'" ;
         SqlCeCommand com = new SqlCeCommand(SearchQuerry,con);

         SqlCeDataReader sqlReader = com.ExecuteReader();

         while (sqlReader.Read())
        {
            txtID.text = sqlReader.GetValue(0).ToString();
            txtRadif.text = sqlReader.GetValue(1).ToString();
            txtName.text = sqlReader.GetValue(2).ToString();
        }

        sqlReader.Close();
        com.Dispose();
        con.Close();
     }
     catch (SqlCeException ex)
     {
         MessageBox.Show(ex.Message);
     }
}

注意：您的代码容易受到sqlinjection的攻击。学习避免它的事情。

如何通过文本框搜索表？

2 个答案: