During find data between two days, getting error "there is no row at position 0"
MySqlConnection connection = new MySqlConnection(ConfigurationManager.ConnectionStrings["Demo"].ConnectionString.ToString());
string str = "select * from sample where name='" + Session["name"] + "' and date between '" + txtfirstdate.Text + "' and '" + txtenddate.Text + "'";
MySqlCommand cmd = new MySqlCommand(str, connection);
MySqlDataAdapter adapter = new MySqlDataAdapter(cmd);
DataSet set = new DataSet();
connection.Open();
adapter.Fill(set);
connection.Close();
//var table = set.Tables[0];
if (set != null)
{
lblname.Text = set.Tables[0].Rows[0]["name"].ToString();
lbldate.Text = set.Tables[0].Rows[0]["date"].ToString();
}
Read the Error Message. Your result set table has no rows.
Replace u r if Condition.
if (set.Tables[0].Rows.Count > 0) {
lblname.Text = set.Tables[0].Rows[0]["name"].ToString();
lbldate.Text = set.Tables[0].Rows[0]["date"].ToString();
}
Related
I'm using c# and this error is becoming headache for me. I do not know how to solve this error .
can anyone help me to solve this. Here is the code
try
{
string MyConnection2 = #"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\DELL\Documents\db1.mdb";
//Display query
string Query = "select riq_num , department, item_name , item_unit , no_of_stock_out , itemtype from outputdet1 where riq_num = " + textBox2.Text + " or department= '" + comboBox1.Text + " ' or item_name= '" + textBox4.Text + "' or item_unit= '" + comboBox2.Text + "' or no_of_stock_out = " + textBox6.Text + " or itemtype = '" + comboBox3.Text + "' ; ";
OleDbConnection MyConn2 = new OleDbConnection(MyConnection2);
OleDbCommand MyCommand2 = new OleDbCommand(Query, MyConn2);
MyConn2.Open();
//For offline connection we will use MySqlDataAdapter class.
OleDbDataAdapter MyAdapter = new OleDbDataAdapter();
MyAdapter.SelectCommand = MyCommand2;
DataTable dTable = new DataTable();
MyAdapter.Fill(dTable);
// here i have assign dTable object to the dataGridView1 object to display data.
dataGridView1.DataSource = dTable;
MyConn2.Close();
}
// OleDbCommand MyCommand2 = new OleDbCommand(Query, MyConn2);
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
I assumed that textBox2.Text & textBox6.Text return a string from textbox control, so that OleDbCommand will throwing exception when it contains empty value or any non-numeric string since it will form invalid SQL statement. Use parameterized query like this example:
string Query = #"select riq_num, department, item_name, item_unit, no_of_stock_out, itemtype
from outputdet1
where riq_num = #riq_num
or department= #department
or item_name= #item_name
or item_unit= #item_unit
or no_of_stock_out = #no_of_stock_out
or itemtype = #itemtype";
using (OleDbConnection MyConn2 = new OleDbConnection(MyConnection2))
{
using (OleDbCommand MyCommand2 = new OleDbCommand(Query, MyConn2))
{
MyConn2.Open();
MyCommand2.Parameters.Add("#riq_num", textBox2.Text);
MyCommand2.Parameters.Add("#department", comboBox1.Text);
MyCommand2.Parameters.Add("#item_name", textBox4.Text);
MyCommand2.Parameters.Add("#item_unit", comboBox2.Text);
MyCommand2.Parameters.Add("#no_of_stock_out", textBox6.Text);
MyCommand2.Parameters.Add("#itemtype", comboBox3.Text);
// execute the query here
}
}
Remember that using statements used to dispose OLEDB connection immediately after it has closed so that GC can free up resources.
Additional note:
OleDbParameter works with parameter order instead of named parameters, hence ensure that the parameters are declared in their proper order from first to last.
Mabuhay!
What is the most efficient or more convenient way to do this.
I have a select query and put it on a datagridview base on my filter. It has 5 columns. I want to know if Column CA from that Datagridview already exist on Table 2 which is on Column 3?
SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=db;User ID=sa;Password=pw");
// DateTime dt = new DateTime();
//dt = DateTime.Now.ToString();
SqlDataAdapter sda = new SqlDataAdapter("SELECT max(PurchaseOrder.POTitle) as Description,sum(PurchaseOrderEntry.Price *PurchaseOrderEntry.QuantityOrdered) as Amount, max(PurchaseOrder.PONumber)as PONumber, " +
" max(PurchaseOrderEntry.OrderNumber) as BoxCount, max(PurchaseOrderEntry.OrderNumber) as PLC,max(PurchaseOrderEntry.OrderNumber) as Branch, max(PurchaseOrderEntry.OrderNumber) as PreparedBy, max(PurchaseOrderEntry.OrderNumber) as CheckedBy " +
" FROM PurchaseOrder LEFT OUTER JOIN" +
" PurchaseOrderEntry ON PurchaseOrder.ID = PurchaseOrderEntry.PurchaseOrderID" +
" WHERE (PurchaseOrder.Remarks like '%" + tanggapan.Text + "%') AND (PurchaseOrder.DateCreated BETWEEN '" + dateTimePicker1.Text + "' AND '" + dateTimePicker2.Text + "' and PurchaseOrder.OtherStoreID = '" + branch.Text + "') Group By PurchaseOrder.PONumber", con);
DataTable dt = new DataTable();
sda.Fill(dt);
dataGridView1.DataSource = dt;
This show my query filter. Any tip on how to do if PurchaseOrderEntry.OrderNumber already exist on my records so I can manage which one repeats.
Thank you!
Chris
I added this code now on my works and it is working now.
DataTable dt = new DataTable();
dt.Clear();
dt.Reset();
con.Close();
adaptors1.SelectCommand = con.CreateCommand();
adaptors1.SelectCommand.CommandText = "Select TOP 1 [ponumber],[clref] from [ISSPandayan].[dbo].[" + branch.Text + "] where [ponumber] = '" + dr.Cells["ponumber"].Value + "' ORDER BY [clref] ASC";
adaptors1.Fill(dt);
// select query para malam kung existing ponumber
if (dt.Rows.Count == 1)
{
adaptorss.InsertCommand.Parameters.Add("#already", SqlDbType.VarChar).Value = dt.Rows[0][1].ToString();
}
else
{
adaptorss.InsertCommand.Parameters.Add("#already", SqlDbType.VarChar).Value = " ";
}
//adaptorss.InsertCommand.Parameters.Add("#already", SqlDbType.VarChar).Value = "";
//MessageBox.Show(Convert.ToString(dr.Cells["description"].Value));
con.Close();
con.Open();
adaptorss.InsertCommand.ExecuteNonQuery();
adaptorss.InsertCommand.Parameters.Clear();
OracleDataAdapter.Fill throws an exception: "ORA-00933: SQL command not properly ended". Usual culprits according to many posts is that some spaces or semicolon at the end. I copied the statement and executed on Oracle "Sql Developer", and it works..
Here is my code (kind of)
var stmt = "SELECT fmly.fmly_id, fmly.fmly_key, fmly.fmly_db_view_nm, MI_DBUMS_UTIL.GET_BASELINE_TABLE_NAME(fmly.fmly_id) blTableName " +
"FROM mi_families AS fmly WHERE fmly.fmly_type_cd = 'ENFA' " +
"AND fmly.fmly_id not in (SELECT fmly_id from mi_exclude_families WHERE context_cd = 'REVERT') " +
"AND EXISTS " + "(SELECT 1 FROM mi_entities_bl AS enty_bl WHERE fmly.fmly_id = enty_bl.fmly_id);";
var conn = new OracleConnection("<connection string>");
var cmd = new OracleCommand(stmt, conn)
IDataAdapter adapter = new OracleDataAdapter(cmd);
DataSet ds = new DataSet();
conn.Open();
cmd.CommandTimeout = 0;
adapter.Fill(ds)
Can someone plz help me with the reason for the exception thrown?
Try this?
var stmt = "SELECT fmly.fmly_id, fmly.fmly_key, fmly.fmly_db_view_nm, MI_DBUMS_UTIL.GET_BASELINE_TABLE_NAME(fmly.fmly_id) blTableName " +
"FROM mi_families AS fmly WHERE fmly.fmly_type_cd = 'ENFA' " +
"AND fmly.fmly_id not in (SELECT fmly_id from mi_exclude_families WHERE context_cd = 'REVERT') " +
"AND EXISTS " + "(SELECT 1 FROM mi_entities_bl AS enty_bl WHERE fmly.fmly_id = enty_bl.fmly_id)";
var conn = new OracleConnection("<connection string>");
var cmd = new OracleCommand(stmt, conn);
IDataAdapter adapter = new OracleDataAdapter(cmd);
DataSet ds = new DataSet();
conn.Open();
cmd.CommandTimeout = 0;
adapter.Fill(ds);
Remove the semi-colon at the end of the SELECT statement and it should work.
I am new to C# and I want to do this ASAP as I've had this problem since past week. I have tried a few approaches and not yet gotten the correct output. Here is my code:
private void btnDelete_Click(object sender, EventArgs e)
{
try
{
String itemcode = tbItemCode.Text.ToString();
String shade = tbShade.Text.ToString();
String rollnumber = tbRollNumber.Text.ToString();
System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection(#"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\Eranga\Documents\Visual Studio 2010\Projects\RollAllocationModel\RollAllocationModel\Roll.mdb;Persist Security Info=True;Jet OLEDB:Database Password=admin");
String deletequery = "DELETE FROM TabRoll WHERE (ItemCode = '" + itemcode + "') AND (Shade = '" + shade + "') AND (RollNumber = '" + rollnumber + "')";
//String deletequery = "SELECT * FROM TabRoll";
//code by query builder ----> DELETE FROM TabRoll WHERE (ItemCode = '" + itemcode + "') AND (Shade = '" + shade + "') AND (RollNumber = '" + length + "');
conn.Open();
OleDbDataAdapter da = new OleDbDataAdapter(deletequery, conn);
OleDbCommandBuilder cb = new OleDbCommandBuilder(da);
DataTable dt = new DataTable();
da.Fill(dt);
BindingSource bSource = new BindingSource();
bSource.DataSource = dt;
dataGridView1.EndEdit();
bSource.EndEdit();
da.Update(dt);
dataGridView1.DataSource = bSource;
conn.Close();
MessageBox.Show("Data deleted");
}
catch (Exception exceptionObj)
{
MessageBox.Show(exceptionObj.Message.ToString());
}
}
Why doesn't the DataGrid does not update with the new record.
I have first manually created a DataSet in my project name recvd.xsd having corresponding recvd.xss. On my button click event i have done the following coding.
try
{
DataSet recvd_REPORT = new DataSet();
DataTable REPORT = new DataTable();
String dd_webCofig = ConfigurationManager.ConnectionStrings["server2"].ConnectionString;
OdbcConnection ddlistconn = new OdbcConnection(dd_webCofig);
ddlistconn.Open();
REPORT = recvd_REPORT.Tables["REPORT"];
DataColumn myDataColumn = new DataColumn();
myDataColumn.DataType = typeof(System.Int32);
myDataColumn.ColumnName = "RECEIVED";
myDataColumn.ReadOnly = false;
myDataColumn.Unique = false;
// Add the Column to the DataColumnCollection.
REPORT.Columns.Add(myDataColumn);
string query = "SELECT case_no as \"RECEIVED\" from dcpanaji.Civil_t where dt_regis > '" + txtStartDate.Text + "' AND dt_regis < '" + txtEndDate.Text + "' AND court_no = " + DropDownList1.SelectedItem + "";
Response.Write(query);
OdbcCommand cmd = new OdbcCommand(query, ddlistconn);
OdbcDataReader loginMyReader = cmd.ExecuteReader();
OdbcDataAdapter adptr = new OdbcDataAdapter(query, ddlistconn);
adptr.Fill(REPORT);
ddlistconn.Close();
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
I am getting the error as
Object reference not set to an instance of an object.
If i remove as \"RECEIVED\" from my SQL query and simply execute my SQL query than the result of my query is as follows (varies depending on user input)
200200000452011 ......, n numbers of 12 digit number.
Please help me to remove the error as to why am i not able to bind to DataTable.
I am getting the error before Response.Write(query); is executed, why is that problem?
I removed the try catch block and now i get the error as
try
SELECT case_no as `RECEIVED` ...
or just
SELECT case_no as RECEIVED ...
Anyway the correct DataSet filling code should look like this:
DataSet ds = new DataSet();
using (OdbcConnection connection = new OdbcConnection(connectionString))
using (OdbcCommand command = new OdbcCommand(sqlQuery, connection)
using (OdbcDataAdapter adapter = new OdbcDataAdapter(command)
{
adapter.Fill(ds);
}
In your SQL instead of \"RECIEVED\" have you tried just RECIEVED, no quotes?
You need not to use \"RECEIVED\" in the query, you can use like below.
query = "SELECT case_no as [RECIEVED] from dcpanaji.Civil_t where dt_regis > '" + txtStartDate.Text + "' AND dt_regis < '" + txtEndDate.Text + "' AND court_no = " + DropDownList1.SelectedItem + "";
you can write query as like
query = "SELECT case_no as RECIEVED from dcpanaji.Civil_t where dt_regis > '" + txtStartDate.Text + "' AND dt_regis < '" + txtEndDate.Text + "' AND court_no = " + DropDownList1.SelectedItem + "";
check like that....