private void textBox7_TextChanged(object sender, EventArgs e)
{
SqlConnection conn = Conn.GetConnection();
conn.Open();
cmd = new SqlCommand("select * from DATA_ITEMS where Items_Name like '" + textBox2.Text + "%'", conn);
ds = new DataSet();
adapter = new SqlDataAdapter (cmd);
adapter.Fill(ds);
dataGridView1.DataSource = ds;
}
I want to ask, why do you want to do a search, but when you type it in the search text box, the data in the grid view disappears (it doesn't appear).
I think you are missing databind in the gridview
private void textBox7_TextChanged(object sender, EventArgs e)
{
SqlConnection conn = Conn.GetConnection();
conn.Open();
cmd = new SqlCommand("select * from DATA_ITEMS where Items_Name like '" + textBox2.Text + "%'", conn);
ds = new DataSet();
adapter = new SqlDataAdapter (cmd);
adapter.Fill(ds);
dataGridView1.DataSource = ds;
dataGridView1.DataBind();
}
Related
This code is working fine but when i search id like 121452, so it will call all numbers that have "1" or "2" in db. so i want it show only the exact id what i search
private void btn_search_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(#"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\acap\Documents\Data.mdf;Integrated Security=True;Connect Timeout=30");
SqlDataAdapter sda = new SqlDataAdapter("SELECT * FROM Student where No_ic = " + boxSearch.Text, con);
DataTable dt = new DataTable();
sda.Fill(dt);
dataGridView1.DataSource = dt;
//dataGridView1.Visible = true;
}
Try this :
Updated: (Previously i forgot to bind dataset.)
private void btn_search_Click(object sender, EventArgs e) {
String bResult = boxSearch.Text;
string connectionString = "Data Source=.;Initial Catalog=sacbase;Integrated Security=True"; // add your conncetion string here
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand("SELECT * FROM Student where No_ic =#val", connection);
cmd.Parameters.AddWithValue("#val", bResult);
SqlDataAdapter dataadapter = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
connection.Open();
dataadapter.Fill(ds, "student_table");
connection.Close();
dataGridView1.DataSource = ds;
dataGridView1.DataMember = "student_table";
}
Please can you assist me in a very weird request
I am building a form to represent a table in a datagridview.
I want to change the data that is bound to the datagridview when i select a different value in a combobox. I bound the event to a button.
i get an error when i run the code:
An unhandled exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll Additional information: Syntax error in query. Incomplete query clause.
the code i have is as follows.
private void Ok_button3_Click(object sender, EventArgs e)
{
OleDbConnection con = new OleDbConnection(#"Provider = Microsoft.ACE.OLEDB.12.0; Data Source = E:\database.accdb; Persist Security Info =False;");
OleDbCommand cmd = new OleDbCommand("Select * From #name ", con);
cmd.Parameters.AddWithValue("#name", comboBox1.SelectedValue);
cmd.CommandType = CommandType.Text;
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
dt.TableName = "Project";
dataGridView1.DataSource = dt;
}
This code will help you:
private void Ok_button3_Click(object sender, EventArgs e)
{
OleDbConnection con = new OleDbConnection(#"Provider = Microsoft.ACE.OLEDB.12.0; Data Source = E:\database.accdb; Persist Security Info =False;");
OleDbCommand cmd = new OleDbCommand(String.Concat("Select * From ",comboBox1.Text), con);
cmd.CommandType = CommandType.Text;
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
dt.TableName = "Project";
dataGridView1.DataSource = dt;
}
you can not pass table name as parameter. you can build sql based on your value selection in your combobox. replace your code with this code and check.
private void Ok_button3_Click(object sender, EventArgs e)
{
OleDbConnection con = new OleDbConnection(#"Provider = Microsoft.ACE.OLEDB.12.0; Data Source = E:\database.accdb; Persist Security Info =False;");
OleDbCommand cmd = new OleDbCommand(String.Concat("Select * From ",comboBox1.SelectedValue), con);
cmd.CommandType = CommandType.Text;
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
dt.TableName = "Project";
dataGridView1.DataSource = dt;
}
If you use Data Bound Items then use comboBox1.SelectedValue. If you use Unbound Mode then use comboBox1.SelectedItem.
private void Ok_button3_Click(object sender, EventArgs e)
{
OleDbConnection con = new OleDbConnection(#"Provider = Microsoft.ACE.OLEDB.12.0; Data Source = E:\database.accdb; Persist Security Info =False;");
//OleDbCommand cmd = new OleDbCommand("Select * From " + comboBox1.SelectedValue.ToString(), con);
OleDbCommand cmd = new OleDbCommand("Select * From " + comboBox1.SelectedItem.ToString(), con);
cmd.CommandType = CommandType.Text;
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
dt.TableName = "Project";
dataGridView1.DataSource = dt;
}
But not advice this way. You can use stored Procedure.
Try This:
private void Ok_button3_Click(object sender, EventArgs e)
{
OleDbConnection con = new OleDbConnection(#"Provider = Microsoft.ACE.OLEDB.12.0; Data Source = E:\database.accdb; Persist Security Info =False;");
string tableName = comboBox1.SelectedValue;
var builder = new SqlCommandBuilder();
string escapedTableName = builder.QuoteIdentifier(tableName);
OleDbCommand cmd = new OleDbCommand("Select * From " + escapedTableName , con);
cmd.CommandType = CommandType.Text;
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
dt.TableName = "Project";
dataGridView1.DataSource = dt;
}
I need to select from my users table the username of the user that has the roleID that I will have to get from the dropdownlist. The data are not appearing in the GridView. Can't see what's wrong, help me please.
Already tried 2 ways
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(cs);
con.Open();
SqlCommand cmd = new SqlCommand("select username from tblUser where roleID like '" + DropDownList1.SelectedValue + "'", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
GridView2.DataSource = dt;
GridView2.DataBind();
con.Close();
}
protected void Button2_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(cs);
con.Open();
SqlCommand cmd = new SqlCommand("select username from tblUser where roleID like '" + DropDownList1.SelectedValue + "'", con);
SqlDataReader reader = cmd.ExecuteReader();
GridView2.DataSource = reader;
GridView2.DataBind();
con.Close();
}
Okay, so this one worked for me. And you also must check the sources. Like what happened to my GridView, it says AutoGenerateColumns = false, I removed it. And it all worked!
protected void Button2_Click(object sender, EventArgs e)
{
string cs = ConfigurationManager.ConnectionStrings["roleDB"].ConnectionString;
SqlConnection con = new SqlConnection(cs);
con.Open();
SqlCommand cmd = con.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select username from tblUser where roleID like '" + DropDownList1.SelectedValue + "'";
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
GridView2.DataSource = dt;
GridView2.DataBind();
con.Close();
}
I'm trying to make a database search in my app where the user would choose the column and enter the search word and the result would come up in a dataviewgrid.
This is the code i've been working on, the problem is that nothing comes up and i'm pretty sure there are entries in the database. EDIT : it's a windows form application
private void button1_Click(object sender, EventArgs e)
{
conn = new SqlConnection("Server = localhost; database = Clients; Integrated Security = SSPI");
conn.Open();
SqlCommand cmd = new SqlCommand("SELECT * From dbo.Tclients WHERE #choice = #input", conn);
cmd.Parameters.AddWithValue("#choice", comboBox1.Text);
cmd.Parameters.AddWithValue("#input", textBox1.Text);
ds = new DataSet();
da = new SqlDataAdapter(cmd);
da.Fill(ds);
dataGridView1.DataSource = ds.Tables[0];
conn.Close();
}
You cannot use a parameter to express the name of a column.
You should populate your combobox with the column names and set its DropDownStyle property to DropDownList (do not allow your user to type the name of the column) and then build your query
private void button1_Click(object sender, EventArgs e)
{
string cmdText = "SELECT * From dbo.Tclients WHERE " + comboBox1.Text + " = #input";
using(SqlConnection conn = new SqlConnection(....))
using(SqlCommand cmd = new SqlCommand(cmdText, conn))
{
conn.Open();
cmd.Parameters.AddWithValue("#input", textBox1.Text);
ds = new DataSet();
da = new SqlDataAdapter(cmd);
da.Fill(ds);
dataGridView1.DataSource = ds.Tables[0];
}
}
you forgot to bind the grid view with datasource
add this after data source
dataGridView1.DataSource = ds.Tables[0];
dataGridView1.DataBind();
private void bunifuThinButton21_Click(object sender, EventArgs e)
{
SqlConnection connection = new SqlConnection();
connection.ConnectionString = (#"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\albasheer\Desktop\games\my_school\my_school\school.mdf;Integrated Security=True;User Instance=True");
connection.Open();
string sql = "select name,id,stage,age,cost from STUDENT where stage like '%" + bunifuCustomLabel1.Text + "%' and name like '%" + bunifuMaterialTextbox1.Text + "%'";
SqlDataAdapter adapter = new SqlDataAdapter(sql, connection);
SqlCommand command = new SqlCommand(sql, connection);
DataTable table = new DataTable();
adapter.Fill(table);
var dt = from t in table.AsEnumerable()
select new
{
id = t.Field<int>("id"),
Name = t.Field<string>("name"),
};
bunifuCustomDataGrid1.DataSource = dt.ToList();
}
So here I'm trying to populate my dropdown list, the code behind is as below:
protected void Page_Load(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(CommonFunctions.GetAppDBConnection(Constants.AppID, Constants.TMDDBConnection));
con.Open();
SqlCommand mycommand = new SqlCommand("select * from MSUnit", con);
SqlDataReader ddlvalues = mycommand.ExecuteReader();
ddlTransactionCategory.DataSource = ddlvalues;
ddlTransactionCategory.DataTextField = "categoryCode";
ddlTransactionCategory.DataValueField = "OrgID";
ddlTransactionCategory.DataBind();
mycommand.Connection.Close();
mycommand.Connection.Dispose();
}
the problem is, I can't seem to get it to work, any help? and is this code doing it right?
plz try below code:
protected void Page_Load(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(CommonFunctions.GetAppDBConnection(Constants.AppID, Constants.TMDDBConnection));
con.Open();
SqlCommand mycommand = new SqlCommand("select * from MSUnit", con);
SqlDataAdapter adp =new SqlDataAdapter(mycommand);
DataSet ds =new DataSet();
adp.Fill(ds);
ddlTransactionCategory.DataSource = ds;
ddlTransactionCategory.DataTextField = "categoryCode";
ddlTransactionCategory.DataValueField = "OrgID";
ddlTransactionCategory.DataBind();
mycommand.Connection.Close();
mycommand.Connection.Dispose();
}
Thanks,
Hitesh
Can't bind to a SqlDataReader (or at least I've never tried it). Get a DataTable or a DataSet instead, fill it and then bind that to the dropdown the same way.
Use SqlDataAdataper like the one below
using (SqlConnection con = new SqlConnection(CommonFunctions.GetAppDBConnection(Constants.AppID, Constants.TMDDBConnection)))
{
con.Open();
SqlDataAdapter da = new SqlDataAdapter("select * from MSUnit", con);
DataTable dt = new DataTable
da.Fill(dt)
ddlTransactionCategory.DataSource = dt;
ddlTransactionCategory.DataTextField = "categoryCode";
ddlTransactionCategory.DataValueField = "OrgID";
ddlTransactionCategory.DataBind();
}
if you want to use DataReader you must insert one-by-one.
while (ddlvalues.Read())
{
ddlTransactionCategory.Items.Add(new ListItem(ddlvalues.getString("OrgID"),ddlvalues.getString("categoryCode")))
}