Display tables from sql in DataGridView

Question

1.00/5 (1 vote)

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Hello
I created a DataBase named charityah containing 5 tables
their names are listed in a combobox
when i choose one of them i want to display its content in a datagridview

What i tried is
first i linked the datagridview to this database
and tried this code that i found

C#

SqlConnection connection = new SqlConnection();
 
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    string s = comboBox1.Text;
     
    connection.ConnectionString = @"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\Downloads\charityah.mdf;Integrated Security=True";
         
    using (connection)
    {
    connection.Open();
    SqlDataAdapter adapter = new SqlDataAdapter("select * from "+s, connection);
    DataSet ds = new DataSet();
    adapter.Fill(ds, s);
    dataGridView1.DataSource = ds;
    dataGridView1.DataMember = s;
    dataGridView1.Refresh();   
}

this method doesn't give me any error and it finds the tables but nothing is seenin the datagridview

Posted 20-May-13 20:24pm

Member 8403770

Updated 20-May-13 20:29pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v3

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Comments

kumar2413 21-May-13 2:36am

u missed dataGridView1.dataBind()

Member 8403770 21-May-13 2:48am

no such method is there any using system i should add?

kumar2413 21-May-13 2:53am

If u didn't bind the data how u going to see in the grid view then

Member 8403770 21-May-13 3:00am

how can i bind it?

kumar2413 21-May-13 3:02am

Just put this code "dataGridView1.dataBind()" after the refresh code and check out.

Member 8403770 21-May-13 3:07am

no such code

kumar2413 21-May-13 3:08am

Paste below this code dataGridView1.Refresh()

Member 8403770 21-May-13 3:12am

i looked for it and it's not used in windowsforms, i paste it and it gave me an error

4 solutions

Solution 1

C#

SqlConnection con = new SqlConnection("Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\Downloads\charityah.mdf;Integrated Security=True");
DataSet ds = new DataSet();
SqlDataAdapter DataAdapter1 = new SqlDataAdapter();
SqlCommand command = new SqlCommand();


command.CommandText = ("select * from"+s, connection);
command.CommandType = CommandType.Text;
command.Connection = con;

DataAdapter1.SelectCommand = command;
DataAdapter1.Fill(ds, s);
DataGridView1.DataSource = ds.Tables[0];

Try this code and see.It might work.

Posted 20-May-13 21:18pm

kumar2413

Comments

Member 8403770 21-May-13 3:48am

Could not find server 'System' in sys.servers. Verify that the correct server name was specified. If necessary, execute the stored procedure sp_addlinkedserver to add the server to sys.servers.

what is this error?

Solution 2

Try -

SqlConnection connection = new SqlConnection();
 
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    string s = comboBox1.Text;
     
    connection.ConnectionString = @"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\Downloads\charityah.mdf;Integrated Security=True";
         
    using (connection)
    {
    connection.Open();
    SqlDataAdapter adapter = new SqlDataAdapter("select * from "+s, connection);
    DataSet ds = new DataSet();
    adapter.Fill(ds, s);
    dataGridView1.DataSource = ds;
    dataGridView1.DataMember = s;
    adapter.Fill(ds);
    dataGridView1.DataSource = ds;
    dataGridView1.DataMember = ds.Tables[0].TableName;
    dataGridView1.Refresh();   
}

Posted 20-May-13 21:56pm

Samresh.ss

Comments

Member 8403770 21-May-13 4:14am

it's working but the same problem as the method i posted
it's not giving me any error but no table is shown in the datagrid view
but i noticed that ds.Tables[0].TableName doesn't give me the tablename i chose

Solution 3

I would change a small part of your code from

C#

dataGridview1.DataSource = ds;

to

C#

dataGridView1.DataSource = ds.Tables[0]

UPDATE:

C#

string TableName = comboBox1.Text;
string Query = "Select * from " + TableName;
DataSet ds = new DataSet();

using(SqlConnection connection = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\Downloads\charityah.mdf;Integrated Security=True"))
{
  SqlDataAdapter da = new SqlDataAdapater();
  da.SelectCommand = new SqlCommand(Query, connection);
  da.fill(ds, TableName);
}

DataGridview1.DataSource = ds.Tables[0];

Posted 20-May-13 22:45pm

Simon_Whale

Updated 21-May-13 0:14am

v2

Comments

Member 8403770 21-May-13 5:46am

there's something else missing :S
can't find what
everything is in the datasource but no changes in the datagridview

Simon_Whale 21-May-13 5:51am

declare the dataset outside of the using(connection) statement and try it again.

Member 8403770 21-May-13 5:54am

nothing changed

Simon_Whale 21-May-13 5:57am

you need to check that there is data in the dataset now.

Member 8403770 21-May-13 6:06am

i already checked

Simon_Whale 21-May-13 6:15am

have a try of the sample that I have added to my solution

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Member 8403770 · Accepted Answer · 2013-05-21T00:15:00

Solution 4

C#

dataGridView1.VirtualMode = false;
dataGridView1.Columns.Clear();
dataGridView1.AutoGenerateColumns = true;

Problem solved :D
ty all for ur help

Posted 21-May-13 0:15am

Member 8403770

Updated 21-May-13 0:16am

v2