[英]c# search concatenated column using textbox
如何搜索串聯的列? 我知道如何進行單列搜索,但我想搜索連接列。.請幫助我
public void searchenrolee()
{
MySqlCommand cmd = connection.CreateCommand();
MySqlDataAdapter adap = new MySqlDataAdapter(cmd);
try
{
connection.Open();
string value = "Fullname";
cmd.CommandText = String.Format(
@"Select EEid, CONCAT(Fname,' ', Mname,' ', Lname) AS Fullname, DateRegistered
from studenttbl
where {0} like @searchKey AND year(DateRegistered) = '" + cbStudYear.selectedValue.ToString() + "' AND Enrollingto = '" + cbSLGrade.selectedValue.ToString() + "' order by EEid desc", value);
cmd.Parameters.AddWithValue("@searchKey", '%' + tbsearchEnrolee.Text.ToString() + '%');
MySqlDataAdapter kuhain = new MySqlDataAdapter(cmd);
DataSet ds = new DataSet();
adap.Fill(ds);
dgvStudentList.DataSource = ds.Tables[0].DefaultView;
connection.Close();
}
catch
{
connection.Close();
}
}
private void tbsearchEnrolee_TextChanged(object sender, EventArgs e)
{
searchenrolee();
}
Crowcoder回答
public void searchenrolee()
{
MySqlCommand cmd = connection.CreateCommand();
MySqlDataAdapter adap = new MySqlDataAdapter(cmd);
try
{
connection.Open();
string value = "Fullname";
cmd.CommandText = String.Format(
@"Select EEid, CONCAT(Fname,' ', Mname,' ', Lname) AS Fullname, DateRegistered
from studenttbl
where CONCAT(Fname,' ', Mname,' ', Lname) like @searchKey AND year(DateRegistered) = '" + cbStudYear.selectedValue.ToString() + "' AND Enrollingto = '" + cbSLGrade.selectedValue.ToString() + "' order by EEid desc", value);
cmd.Parameters.AddWithValue("@searchKey", '%' + tbsearchEnrolee.Text.ToString() + '%');
MySqlDataAdapter kuhain = new MySqlDataAdapter(cmd);
DataSet ds = new DataSet();
adap.Fill(ds);
dgvStudentList.DataSource = ds.Tables[0].DefaultView;
connection.Close();
}
catch
{
connection.Close();
}
}
private void tbsearchEnrolee_TextChanged(object sender, EventArgs e)
{
searchenrolee();
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.