SqlConnection con = new SqlConnection("Data Source=MOSTAFA;Initial Catalog=mohasba;Integrated Security=True");
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = con.CreateCommand();
da.SelectCommand.CommandText = "select sum(مدين) AS مدين,sum (دائن) AS دائن from اذن_قيد where اسم_البيان='" + comboBox1.SelectedIndex + "'";
da.Fill(ds, "اذن_قيد");
dataGridView1.DataSource = ds;
dataGridView1.DataMember = "اذن_قيد";
When i use this code, it return null data
But When i use this command in sql server "Return Data"
I dont think there is any error with the code above.
What you can try is, First of all make sure that the connection string you are using can access the database.
Secondly, since you are using some kind of language coallation in your sql server queries, make sure that ASP.NET recongnizes the query and sends them to the sql server in the appropiate coallation.
Hope this helps.
Related
I am using SQL to fill my datagridview. I am doing that this way:
string cn = ConfigurationManager.ConnectionStrings["Scratchpad"].ConnectionString;
SqlConnection myConnection = new SqlConnection(cn);
string sql = "some text here";
SqlDataAdapter dataadapter = new SqlDataAdapter(sql, myConnection);
DataSet ds = new DataSet();
myConnection.Open();
dataadapter.Fill(ds, "Authors_table");
myConnection.Close();
dataGridView1.DataSource = ds;
dataGridView1.DataMember = "Authors_table";
Now it deletes the old datagridview and paste the selection. But I want just to add the data to the column right of the existing data.
Thanks in advance
This requirement sounds like it could be met with a SQL Inner Join in the query you're using in your SqlDataAdapter. If you were able to join your two data sources together on matching keys, you could simply pull the data down once. But I'm going to assume there's some reason why that won't work for you.
You can in fact do what you want with a DataSet, but you'll need to take a few more steps:
string sql = "The first query"
SqlDataAdapter dataadapter = new SqlDataAdapter(sql, myConnection);
DataSet ds = new DataSet();
myConnection.Open();
dataadapter.Fill(ds, "Authors_table");
myConnection.Close();
// I don't know what your primary key is, but you need to have one.
// I am assuming it's called "author_id".
DataColumn authorIdColumn = ds.Tables["Authors_table"].Columns["author_id"];
ds.Tables["Authors_table"].PrimaryKey = new[] { authorIdColumn };
// Get your second set of data
sql = "My second query, which also has the same primary key, but has more columns"
dataadapter = new SqlDataAdapter(sql, myConnection);
dataadapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
DataSet ds2 = ds.Clone();
myConnection.Open();
dataadapter.Fill(ds2, "Authors_table");
myConnection.Close();
// Now we use the DataSet.Merge method, which is very powerful.
ds.Merge(ds2, false, MissingSchemaAction.AddWithKey);
dataGridView1.DataSource = ds;
dataGridView1.DataMember = "Authors_table";
You may have to experiment with that a lot: this is just the outline. Without knowing your data and what you do up to this point, it's hard to know what settings or methods you might also need to call.
Try this. I ran multiple queries in one go
SqlDataAdapter adapter = new SqlDataAdapter(
"SELECT * FROM Customers; SELECT * FROM Orders", connection);
adapter.TableMappings.Add("Table", "Customer");
adapter.TableMappings.Add("Table1", "Order");
adapter.Fill(ds);
I am getting the following error trying to execute the code below
No Value Given For One Or More Required Parameters.
string paraName = "CONTROL";
string fullPathToExcel = #"C:\Users\xbbjn2h\Desktop\Mapping.xlsx";
string connString = string.Format(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0 Xml;HDR=YES;""",fullPathToExcel);
string sql = "SELECT [FUNCTION],[NAME] from [Sheet1$] WHERE [FUNTION] = ?";
OleDbConnection conn = new OleDbConnection();
conn.ConnectionString = connString;
using (OleDbCommand cmd = new OleDbCommand(sql, conn))
{
cmd.Parameters.AddWithValue("?", paraName);
DataSet ds = new DataSet();
conn.Open();
OleDbDataAdapter dab = new OleDbDataAdapter(cmd);
dab.Fill(ds);
dataGridView1.DataSource = ds.Tables[0];
conn.Close();
}
OleDbCommand does not support named parameters (see the docs). What you need to do is something like:
cmd.Parameters.Add(new OleDbParameter { Value = paraName });
Edit: I haven't tried it, but I suppose it might be possible to use your above code and pass null as the name argument...
James, I can see that you are trying to parametrize as you would with SQL. However OleDb wouldn't follow the exact pattern. In OleDb you can simply put question marks in your sql sentence and fill them up later using Parameter.Add().value which is quite straight forward.
As MSDN reference points out:
The OLE DB .NET Provider does not support named parameters for passing
parameters to an SQL statement or a stored procedure called by an
OleDbCommand when CommandType is set to Text.
I have rewritten your code in the way it should look like
string paraName = "CONTROL";
string fullPathToExcel = #"C:\Users\xbbjn2h\Desktop\Mapping.xlsx";
string connString = string.Format(#"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0 Xml;HDR=YES;""",fullPathToExcel);
string sql = string.Format("SELECT [{0}],[{1}] from [{2}] WHERE [{0}] = ?", strFunction, strName, strSheetName);
conn.ConnectionString = connString;
using (OleDbConnection conn = new OleDbConnection())
{
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = conn;
cmd.CommandText = sql;
cmd.Parameter.Add("#Param1", OleDbType.VarChar).Value = paraName; // paraName or any value you wish.
DataSet ds = new DataSet();
conn.Open();
OleDbDataAdapter dab = new OleDbDataAdapter(cmd); //or cmd.ExecuteNonQuery(); in Insert sql commands.
dab.Fill(ds);
dataGridView1.DataSource = ds.Tables[0];
conn.Close();
}
Note, You should put your OleDbConnection inside the using statement rather than your OleDbCommand.
I haven't tested it and it may contain some minor error. Other than that punch it there and press play (F5).
You can find more on OleDb parametrization from OleDbCommand.Parameters Property
Good luck and let us know what happens.
When retrieving a datatable from database using the following code in ASP.Net & C#:
The database is located in my local machine.
string connectionString = #"Data Source=CCS90; Initial Catalog=Ribo; Trusted_Connection=True;";
SqlConnection myConn = new SqlConnection(connectionString);
myConn.Open();
SqlCommand sqlCommand = new SqlCommand("SELECT * FROM PUR_POHEADER WHERE POID = #POID", myConn);
sqlCommand.Parameters.Add("#POID", SqlDbType.Int);
sqlCommand.Parameters["#POID"].Value = Convert.ToInt32(request.ReferenceNo);
DataSet DS = new DataSet();
SqlDataAdapter AD = new SqlDataAdapter(sqlCommand, myConn);
//AD.Fill(DS);
AD.Fill(DS, "POTABLE"); //Error arise at this place
DataTable DT = DS.Tables[0];
myConn.Close();
When compiler comes to the line AD.Fill(DS, "POTABLE");, error occurs at Incorrect syntax near '). What may be the reason?
You create a SqlCommand with a SELECT statement and then you don't use it. What is insertStatement? Surely you should be using sqlCommand.
You may try with
AD.Fill(DS);
instead of
AD.Fill(DS,"PORTABLE");
Also try:
SqlDataAdapter AD = new SqlDataAdapter(sqlCommand);
instead of
SqlDataAdapter AD = new SqlDataAdapter(insertStatement, myConn);
Problem is here:
SqlDataAdapter AD = new SqlDataAdapter(insertStatement, myConn);
replace it with:
SqlDataAdapter AD = new SqlDataAdapter(sqlCommand);
and also you are using this overload i think:
AD.Fill(DS, "NameOfDataTable");
then you can access it like this:
DataTable DT = DS.Tables["NameOfDataTable"];
insetad of using 0 index.
I'm using VS2012 and SQL Server Express 2008. I've boiled down my connection/query to try and find out why my DataSet is not being filled. The connection is completed successfully, and no exceptions are thrown, but the adapter does not fill the DataSet. The database that this is pulling from is on the same PC and using localhost\SQLEXPRESS does not change the result. Thanks for any input!
SqlConnection questionConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString);
questionConnection.Open();
String sql = "SELECT * FROM HRA.dbo.Questions";
SqlDataAdapter adapter = new SqlDataAdapter();
DataSet ds = new DataSet();
SqlCommand command = new SqlCommand(sql, questionConnection);
adapter.SelectCommand = command;
adapter.Fill(ds);
adapter.Dispose();
command.Dispose();
questionConnection.Close();
Connection String:
<add name="DefaultConnection" providerName="System.Data.SqlClient" connectionString="Data Source=CODING-PC\SQLEXPRESS;Initial Catalog=HRA;User ID=sa; Password= TEST" />
try this:
SqlConnection questionConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString);
questionConnection.Open();
DataSet ds = new DataSet();
String sql = "SELECT * FROM HRA.dbo.Questions";
SqlDataAdapter adapter = new SqlDataAdapter(sql, questionConnection);
adapter.Fill(ds);
adapter.Dispose();
command.Dispose();
questionConnection.Close();
It appears the answer has already been found, however, I am posting one anyway to advocate the use of using blocks, and also letting the .NET framework do the hardwork for you. Your 11 lines of code can be rewritten in 3:
DataSet ds = new DataSet();
using (var adapter = new SqlDataAdapter("SELECT * FROM HRA.dbo.Questions", ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString))
{
adapter.Fill(ds);
}
Is "HRA.dbo.Questions" an actual table?
Your connectionstring contains an Initial Catalog with value "HRA", and the SQL should only contain dbo.Questions as far as I know.
Check that you dont have the fill statement in another part of the code such as in the page load event.
I am using MySQL as DB and I want to retrieve table data to GridView in my browser. Below is the code I am using, there are no errors but if I run the page, it shows blank
MySqlConnection myconn = new MySqlConnection("server=localhost;user id=;password=;database=workers;");
string strSQL = "select * from details";
MySqlDataAdapter mydata = new MySqlDataAdapter(strSQL, myconn);
MySqlCommandBuilder cBuilder = new MySqlCommandBuilder(mydata);
DataSet ds = new DataSet();
mydata.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
myconn.Close();
I have tried with Microsoft SQL Server DB by adding DB file and same content in DB, then it worked.
you did not open your connections. try it by adding this
myconn.open();
before this line
MySqlDataAdapter mydata = new MySqlDataAdapter(strSQL, myconn);
open your database connections