TECHNOLOGIES
FORUMS
JOBS
BOOKS
EVENTS
INTERVIEWS
Live
MORE
LEARN
Training
CAREER
MEMBERS
VIDEOS
NEWS
BLOGS
Sign Up
Login
No unread comment.
View All Comments
No unread message.
View All Messages
No unread notification.
View All Notifications
Answers
Post
An Article
A Blog
A News
A Video
An EBook
An Interview Question
Ask Question
Forums
Monthly Leaders
Forum guidelines
Prakash Mondal
NA
288
208.2k
how to set selected value from database in combobox c#
Apr 24 2021 11:30 AM
private void Form1_Load(object sender, EventArgs e)
{
cn.con.Open();
DataTable dt = new DataTable();
string sql = "SELECT * FROM STUDENTMAS";
SqlDataAdapter da = new SqlDataAdapter(sql, cn.con);
da.Fill(dt);
dataGridView2.AutoGenerateColumns = false;
dataGridView2.DataSource = dt;
cn.con.Close();
}
private void dataGridView2_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
// load category comboBox2 =================================================
DB_CONNECTION cn = new DB_CONNECTION();
cn.con.Open();
cn.cmd.Connection = cn.con;
cn.cmd.CommandText = "SELECT ID,NAME FROM CATEGORYTB ";
System.Data.SqlClient.SqlDataReader dr;
dr = cn.cmd.ExecuteReader();
if (dr.HasRows)
{
combobox_id.Items.Clear();
while (dr.Read())
{
ComboboxItem item = new ComboboxItem();
item.Text = dr["NAME"].ToString();
item.Value = dr["ID"].ToString();
comboBox2.Items.Add(item);
}
}
cn.con.Close();
//===================================================================
// How to load category comboBox2 with a value of category field in studentmas table.
// I try several processes, but not load
//comboBox1.SelectedIndex = comboBox1.FindStringExact(dataGridView2.Rows[e.RowIndex].Cells["ID"].Value.ToString());
//comboBox1.SelectedValue = dataGridView2.Rows[e.RowIndex].Cells["ID"].Value.ToString();
//comboBox1.SelectedIndex = comboBox1.Items.IndexOf(dataGridView2.Rows[e.RowIndex].Cells["ID"].Value.ToString());
}
Database table (categoryTB):
id
name
status_flag
C1
General
Y
C2
SC
Y
C3
ST
Y
C4
OBC
Y
DatabaseTable(studentmas) :
roll_no
name
session
semester
category
R1
Rahit
Autumn
2021
C1
R2
Rahon
Spring
2021
C1
R3
Smith
Spring
2021
C3
R5
Alam
Autumn
2021
C2
Please help
Reply
Answers (
1
)
after putting wrong url it goes to right url-how to restrict wrong url
Repeater control each row id on button click