i have a data list in which i am displaying record from two different tables like this
string outBox = "Select DISTINCT ToUserID from OutboxMessages WHERE FromUserID = '" + Session["UserId"].ToString() + " ' ";
String inBox = "Select DISTINCT FromUserID from InboxMessages WHERE ToUserID = '" + Session["UserId"].ToString() + " ' ";
con = new SqlConnection("Data Source=(local);Initial Catalog=EventOrganizer;Integrated Security=True");
da = new SqlDataAdapter(outBox, con);
da.Fill(ds1, "Record");
da = new SqlDataAdapter(inBox, con);
da.Fill(ds2, "Record");
ds1.Merge(ds2);
GridView2.DataSource = ds1;
GridView2.DataBind();
DataList1.DataSource = ds1;
DataList1.DataBind();
output is:
FromUserID ToUserID
3
7
2
7
see 7 is appearing twice i want it to appear only once ..any ideas??
Create a new table with the filtered data from Original table and bind that new table to datalist. A sample below
Create a new table first
DataTable dt = new DataTable();
dt.Columns.Add("FromUserID", typeof(string));
dt.Columns.Add("ToUserID", typeof(string));
if(ds1.Tables[0].Rows.Count > 0)
{
foreach(DataRow rw in ds1.Tables[0].Rows)
{
if(rw["FromUserID"] != rw["ToUserID"])
{
dt.Rows.Add(rw["FromUserID"].ToString(), rw["ToUserID"].ToString());
}
else
{
dt.Rows.Add(rw["FromUserID"].ToString(), "");
}
}
}
Bind this newly created table to datalist
DataList1.DataSource = dt;
DataList1.DataBind();
Related
I'm trying to insert a record in the table but the problem is in that table have 3 foreign keys. I'll be using dataTable for that but it gives an error 'There is no row position at 0'
There is my code:
try
{
using (var sqlConnection = new Helpers.SqlConnectionHelpers())
{
var connection = sqlConnection.OpenConnection();
command = new SqlCommand("CarSold_Insert", connection);
command.CommandType = CommandType.StoredProcedure;
SqlCommand commandTwo = new SqlCommand("SELECT CarForSaleId, UserId, SalesPersonId FROM CarSold WHERE Price = '" + txtPrice.Text + "'", connection);
DataTable table = new DataTable();
DataSet dataSet = new DataSet();
table.Load(commandTwo.ExecuteReader());
var carForSaleId = table.Rows[0]["CarForSaleId"].ToString();
var userId = table.Rows[0]["UserId"].ToString();
var salesPersonId = table.Rows[0]["SalesPersonId"].ToString();
command.Parameters.AddWithValue("CarForSaleId", carForSaleId);
command.Parameters.AddWithValue("UserId", userId);
command.Parameters.AddWithValue("SalesPersonId", salesPersonId);
command.Parameters.AddWithValue("Price", txtPrice.Text);
command.Parameters.AddWithValue("DateSold", dateSold);
command.Parameters.AddWithValue("MonthlyPaymentDate", monthlyPaymentDate);
command.Parameters.AddWithValue("MonthlyPaymentAmount", txtPaymentAmount.Text);
//connection.Open();
int k = command.ExecuteNonQuery();
command.Parameters.Clear();
if (k != 0)
{
Response.Redirect("~/AdminPanel/CarSold.aspx");
}
else
{
lblAns.Text = "Record Not Inserted into the database";
lblAns.ForeColor = System.Drawing.Color.Red;
}
}
}
catch (Exception ex)
{
lblAns.Text = ex.Message;
}
Since Price column is float you need to write query with query parameter like this:
SqlCommand commandTwo = new SqlCommand("SELECT CarForSaleId, UserId, SalesPersonId FROM CarSold WHERE Price = #Price", connection);
commandTwo.Parameters.AddWithValue("#Price", txtPrice.Text);
The above mentioned command will give return you the carForSaleId, userId, salesPersonId which you will use in the insert command
I want to get only single row from multiple rows with same projectname from the datatable.(Eg. if we have two rows with same projectname,the datatable should be loaded with the only one row and neglect the other one.).I have been using webservices which has the datatable.
I want to achieve this functionality using linq.
I have pasted my code for datatable.Pls help me with working code.
[WebMethod]
public DataTable Get()
{
int a = 0;
cmd = con.CreateCommand();
con.Open();
cmd = con.CreateCommand();
cmd.CommandText = " Select PROJECTNAME,COMPANY,PROJECTSTATUS,STARTEDIN,COMPLETEDIN FROM CMPPROJECT WHERE STATUS ='" + a + "'";
using (OracleDataAdapter sda = new OracleDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataTable dt = new DataTable())
{
dt.TableName = "CMPPROJECT";
sda.Fill(dt);
return dt;
}
}
}
You can create a DataView object which has a method ToTable in which you can pass true to parameter distinct to select distinct rows. But this has no sense to me. I would do this directly in a select query:
DataTable d = new DataTable("CMPPROJECT");
d.Columns.Add("PROJECTNAME");
d.Columns.Add("COMPANY");
d.Rows.Add(1, 1);
d.Rows.Add(1, 1);
d.Rows.Add(2, 2);
d = new DataView(d).ToTable("CMPPROJECT", true, "PROJECTNAME", "COMPANY");
Here is `linq solution:
var select = (from a in d.AsEnumerable()
select new { c1 = a["PROJECTNAME"], c2 = a["COMPANY"] }).Distinct().ToList();
d.Clear();
foreach (var item in select)
d.Rows.Add(item.c1, item.c2);
con.Open();
SqlDataAdapter da4 = new SqlDataAdapter("select * from tblbooking where bookid =(select max(bookid) from tblbooking)", con);
DataSet ds4 = new DataSet();
pay = ds4.Tables[0].Rows[0]["costoftickets"].ToString();
Label4.Text = "Amount to Pay : " + pay + " INR.";
da4.Fill(ds4);
DetailsView1.DataSource = ds4;
DetailsView1.DataBind();
con.Close();
You have not filled the DataSet before accessing its contents, so naturally there's no data in it.
con.Open();
SqlDataAdapter da4 = new SqlDataAdapter("select * from tblbooking where bookid =(select max(bookid) from tblbooking)", con);
DataSet ds4 = new DataSet();
da4.Fill(ds4); // this needs to go before accessing the data
pay = ds4.Tables[0].Rows[0]["costoftickets"].ToString();
Label4.Text = "Amount to Pay : " + pay + " INR.";
DetailsView1.DataSource = ds4;
DetailsView1.DataBind();
con.Close();
Note that you still might get errors if your query returns no data.
I need the address (below the dropdown) to change as per the name that is selected in the dropdown... (they are all for one user only)...! (i donno why this keeps saying your post seems only code!!!!!!)
public DataSet BindDropDownListToAUserAddress2()
{
UserFunctions objGetSession = new UserFunctions();
string strSession = objGetSession.GetEmailFromSession();
DataSet dsUserAddress = new DataSet();
SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["ConnectionString"]);
con.Open();
string strQuery = "(SELECT FirstName +' '+ LastName as FullName, * FROM AUserAddress inner join AState on AUserAddress.State_ID = AState.ID inner join ACountry on AUserAddress.Country_ID = ACountry.ID inner join AUser on AUserAddress.AUser_ID=AUser.ID where AUser.Email='" + strSession + "')";
SqlCommand cmd = new SqlCommand(strQuery, con);
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
da.Fill(dsUserAddress, "AUserAddress");
con.Close();
return dsUserAddress;
}
protected void ddlName_SelectedIndexChanged(object sender, EventArgs e)
{
DataSet dsUserAddress = objBindDDL.BindDropDownListToAUserAddress2();
string strSession = objGetSession.GetEmailFromSession();
ddlName.SelectedValue = "FullName";
if (objBindDDL.BindDropDownListToAUserAddress2() != null && objBindDDL.BindDropDownListToAUserAddress2().Tables.Count > 0)
{
lblDisplayFirstName.Text = dsUserAddress.Tables["AUserAddress"].Rows[0]["FirstName"].ToString();
lblDisplayLastName.Text = dsUserAddress.Tables["AUserAddress"].Rows[0]["LastName"].ToString();
lblDisplayAddressLine1.Text = dsUserAddress.Tables["AUserAddress"].Rows[0]["AddressLine1"].ToString();
lblDisplayAddressLine2.Text = dsUserAddress.Tables["AUserAddress"].Rows[0]["AddressLine2"].ToString();
lblDisplayAddressLine3.Text = dsUserAddress.Tables["AUserAddress"].Rows[0]["AddressLine3"].ToString();
lblDisplayCity.Text = dsUserAddress.Tables["AUserAddress"].Rows[0]["City"].ToString();
lblDisplayState.Text = dsUserAddress.Tables["AUserAddress"].Rows[0]["StateName"].ToString();
lblDisplayCountry.Text = dsUserAddress.Tables["AUserAddress"].Rows[0]["CountryName"].ToString();
lblDisplayPostalCode.Text = dsUserAddress.Tables["AUserAddress"].Rows[0]["PostalCode"].ToString();
}
}
when you are binding data to dropdown list
ddlStatus.DataTextField = "FullName";
ddlStatus.DataValueField = "Id";
onselected index change event
int ID =Convert.Toint32(ddlName.SelectedValue)
by using this ID select only this ID Record from the dataTable and display
2 questions for everybody.
1) How can I order the years by their value, it crashes when I use DESC?
2) If I populate my list like so:
string strConn = ConfigurationManager.ConnectionStrings["rde_410978ConnectionString"].ToString();
SqlConnection con = new SqlConnection(strConn);
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "Select Distinct Year from MonthlySales DESC"; //DESC DOESNT WORK?
DataSet objDs = new DataSet();
SqlDataAdapter dAdapter = new SqlDataAdapter();
dAdapter.SelectCommand = cmd;
con.Open();
dAdapter.Fill(objDs);
con.Close();
if (objDs.Tables[0].Rows.Count > 0)
{
ddItems.DataSource = objDs.Tables[0];
ddItems.DataTextField = "Year";
ddItems.DataValueField = "Year";
ddItems.DataBind();
ddItems.Items.Insert(0, "Select");
}
How can I make the year selected appear under ddItems.SelectedItem?
WHERE Year = " + ddItems.SelectedItem + "GROUP BY Name ";
That part of another query doesn't work when I populate my list dynamically, any reasons why/ how can I fix it.
Regards.
EDIT:
To make my second question clearer, after debugging its always selecting the top item in the drop down list not the actual selected item?
First, in your sql you are missing "order by"...use this
"Select Distinct Year from MonthlySales order by Year DESC"
Second, you need to make use of the SelectedValue property to get your dropdown's selected value...as below...
WHERE Year = " + ddItems.SelectedValue + " GROUP BY Name";
Having said that, I strongly recommend you to use..."parameterized" sql...Here is an example on how you could enable parameterized sql query...
Give me parameterized SQL, or give me death
Update:
Looks like you are binding your dropdown on every post back...you may try this...
if (!Page.IsPostBack && objDs.Tables[0].Rows.Count > 0)
{
ddItems.DataSource = objDs.Tables[0];
ddItems.DataTextField = "Year";
ddItems.DataValueField = "Year";
ddItems.DataBind();
ddItems.Items.Insert(0, "Select");
}
Ans 1)
cmd.CommandText = "Select Distinct Year from MonthlySales ORDER BY 1 DESC"
You are missing order by. Here it is.
"Select Distinct Year from MonthlySales order by Year DESC";
For your second part you can do this. Please mind the space in " GROUP BY Name"
WHERE Year = " + ddItems.SelectedItem.Text + " GROUP BY Name ";
using (SqlConnection con = new SqlConnection(strConn))
{
using (SqlCommand cmd = new SqlCommand())
{
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "Select Distinct Year from MonthlySales Order By DESC";
using (DataSet objDs = new DataSet())
{
using (SqlDataAdapter dAdapter = new SqlDataAdapter())
{
dAdapter.SelectCommand = cmd;
con.Open();
dAdapter.Fill(objDs);
con.Close();
if (objDs.Tables[0].Rows.Count > 0)
{
ddItems.DataSource = objDs.Tables[0];
ddItems.DataTextField = "Year";
ddItems.DataValueField = "Year";
ddItems.DataBind();
ddItems.Items.Insert(0, "Select");
}
}
}
}
}