getting next previous records

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hi i have problem on getting next,previous records in C#.net windows application

descreption:

i have binded data to datagridview and when i click datagridview middle cell the perticular
row data goes to next form as details .i want navigate data from that middle row data
by counting for next button and decrement for previous button but im getting from begining.s~~o please send solution to my emailid~~ [email removed]

Posted 3-Apr-12 5:10am

panduRajju

Updated 3-Apr-12 5:31am

fjdiewornncalwe

v2

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Shahin Khorshidnia · Answer 1 · 2012-04-03T10:27:00

Solution 1

Hello

Suppose, there is a List of MyObject, and you've bound MyObjectCollection to the DataGrid

C#

List<mytype> MyObjectCollection

When you select a object then you want the Next and the Previous:

C#

public MyType GetNextItem(object selectedObject, List<MyType> myObjectCollection)
{
    int c = myObjectCollection.TakeWhile(o => o == selectedObject).Count() - 1;

    int p = c - 1;
    int n = c + 1;

    return (myObjectCollection.Count() >= n + 1) ? myObjectCollection[n] : null;
}

public MyType GetPreviousItem(object selectedObject, List<MyType> myObjectCollection)
{
    int c = myObjectCollection.TakeWhile(o => o == selectedObject).Count() - 1;

    int p = c - 1;
    int n = c + 1;

    return (p >= 0) ? myObjectCollection[p] : null;
}

Posted 3-Apr-12 10:27am

Shahin Khorshidnia

Updated 4-Apr-12 7:33am

v3

Comments

panduRajju 4-Apr-12 1:15am

thanq u for your response but its not working
my requirement is i have data in datagridview when i click by celldoubleck event
the perticular row data goes to another form.from that form when i click next or previous button it navigating from begining record onwards.but i want to navigate from selected record onwards.

Shahin Khorshidnia 4-Apr-12 5:23am

What's the navigating control in the other form? Does it have a SelectedItem or a SelectedIndex property?

panduRajju 4-Apr-12 9:01am

in another form the data in binding to textboxes. if i click next button i want
display details of next record and previous button for previous record

panduRajju 4-Apr-12 9:37am

no selecteditem and selectedindex

panduRajju 4-Apr-12 9:41am

my code in another form is

private void btnNext_Click(object sender, EventArgs e)
{

objCourtDetails.Action = "select";
ds = objCourtDetails.CourtDetailsSelect_Bal(objCourtDetails);
//nt i = Convert.ToInt32(txtCourtID.Text);
////dgvCourtView.DataSource = ds.Tables[0];

//if( i >-1 )
if (i < ds.Tables[0].Rows.Count - 1)
{
//nt j = i + 1;
i++;
txtCourtID.Text = ds.Tables[0].Rows[i]["ID"].ToString();
txtcomboCourtType.Text = ds.Tables[0].Rows[i]["CourtType"].ToString();
txtCourtCode.Text = ds.Tables[0].Rows[i]["CourtCode"].ToString();
txtCourtName.Text = ds.Tables[0].Rows[i]["CourtName"].ToString();
txtCourtLocation.Text = ds.Tables[0].Rows[i]["CourtLocation"].ToString();
txtCity.Text = ds.Tables[0].Rows[i]["City"].ToString();
txtState.Text = ds.Tables[0].Rows[i]["State"].ToString();
txtCountry.Text = ds.Tables[0].Rows[i]["Country"].ToString();
txtZipCode.Text = ds.Tables[0].Rows[i]["ZipCode"].ToString();
txtURL.Text = ds.Tables[0].Rows[i]["URL"].ToString();
txtWorkPhone.Text = ds.Tables[0].Rows[i]["WorkPhone"].ToString();
txtEmailAddress.Text = ds.Tables[0].Rows[i]["EmailAddress"].ToString();
txtFAX.Text = ds.Tables[0].Rows[i]["FAX"].ToString();
txtOther.Text = ds.Tables[0].Rows[i]["Other"].ToString();
txtNote.Text = ds.Tables[0].Rows[i]["Note"].ToString();
txtComments.Text = ds.Tables[0].Rows[i]["Comments"].ToString();
//txtComments.Text = ds.Tables[0].Rows[i]["DateofEntered"].ToString();
//txtComments.Text = ds.Tables[0].Rows[i]["Comments"].ToString();

}
else
{
//no records to see more.
MessageBox.Show("No Records Found");
}

}

panduRajju 4-Apr-12 9:43am

and for previous button

objCourtDetails.Action = "select";
ds = objCourtDetails.CourtDetailsSelect_Bal(objCourtDetails);
////dgvCourtView.DataSource = ds.Tables[0];

//int i = Convert.ToInt32(txtCourtID.Text);
//if (i > -1 || i != 0)
if (i == ds.Tables[0].Rows.Count - 1 || i != 0)
{
i--;
txtCourtID.Text = ds.Tables[0].Rows[i]["ID"].ToString();
txtcomboCourtType.Text = ds.Tables[0].Rows[i]["CourtType"].ToString();
txtCourtCode.Text = ds.Tables[0].Rows[i]["CourtCode"].ToString();
txtCourtName.Text = ds.Tables[0].Rows[i]["CourtName"].ToString();
txtCourtLocation.Text = ds.Tables[0].Rows[i]["CourtLocation"].ToString();
txtCity.Text = ds.Tables[0].Rows[i]["City"].ToString();
txtState.Text = ds.Tables[0].Rows[i]["State"].ToString();
txtCountry.Text = ds.Tables[0].Rows[i]["Country"].ToString();
txtZipCode.Text = ds.Tables[0].Rows[i]["ZipCode"].ToString();
txtURL.Text = ds.Tables[0].Rows[i]["URL"].ToString();
txtWorkPhone.Text = ds.Tables[0].Rows[i]["WorkPhone"].ToString();
txtEmailAddress.Text = ds.Tables[0].Rows[i]["EmailAddress"].ToString();
txtFAX.Text = ds.Tables[0].Rows[i]["FAX"].ToString();
txtOther.Text = ds.Tables[0].Rows[i]["Other"].ToString();
txtNote.Text = ds.Tables[0].Rows[i]["Note"].ToString();
txtComments.Text = ds.Tables[0].Rows[i]["Comments"].ToString();
//txtComments.Text = ds.Tables[0].Rows[i]["DateofEntered"].ToString();
//txtComments.Text = ds.Tables[0].Rows[i]["Comments"].ToString();
}

else
{
//no records to see more.
}
}

Shahin Khorshidnia 4-Apr-12 13:38pm

Ok, 1. If you have not a List of your entity create one (myObjectCollection) 2. Pass the SelectedItem and the collection of data (in my example: myObjectCollection) to the other form. You must pass them, in CellDoubleClick event. 3. Use the methods that I wrote in updated solution. I tested it and works. you know that "MyType" is an example and you must change it to your defined type.

Shahin Khorshidnia 5-Apr-12 17:06pm

And?

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