Re: Dynamically add TabPages to my form depending on the number of worksheets in a spreadsheet - C# Discussion Boards

I did as you told me and the datagrid is visible in each tabpage but now the problem is that it only shows the data that is in the first sheet in all the tabs. Each tabpage should have its own data and should display its own worksheet in the datagrid.

Mvelo Walaza
Developer
Telkom SA

Where does that variable named worksheet come from? Instead of using worksheet to check validity and get range, you should be using the variable name sheet. Replace the variable named worksheet with the variable named sheet inside of the foreach loop.

Lester
http://www.lestersconyers.com

Thank you very much, it worked!!

Mvelo Walaza
Developer
Telkom SA

Hi,
Would you happen to know how I could take the data from all the dynamically created tabpages’ datagrids and export the data to excel and create a new worksheet for each tabpage as it is exporting. Currently it takes data from one dynamically created tabpage (the default)‘s datagrid and exports it to a spreadsheet. Here's the code I have so far:

Microsoft.Office.Interop.Excel._Application _appClass = new ApplicationClass();
_appClass.Visible = true;

_appClass.Caption = "Exported ECS Errors";

Microsoft.Office.Interop.Excel.Workbook wbk = _appClass.Workbooks.Add(XlWBATemplate.xlWBATWorksheet);

Worksheet obj = (Worksheet)wbk.ActiveSheet;

// get the collection of sheets in the workbook
Microsoft.Office.Interop.Excel.Sheets sheets = wbk.Worksheets;

Range r = (Range)obj.Cells;

try
{
//Load the Headers and make them BOLD
for (int i = 0; i < ((DataGridView)this.dgOutput).Columns.Count; i++)
{
r[1, i + 1] = ((DataGridView)this.dgOutput).Columns[i].HeaderText.ToString();
((Range)r.Cells[1, i + 1]).Font.Bold = true;
}

//Load the data from the datagrid to the new spreadsheet
for (int i = 1; i < ((DataGridView)this.dgOutput).Rows.Count - 1; i++)
{
for (int j = 0; j < ((DataGridView)this.dgOutput).Columns.Count; j++)
{

r[i + 1, j + 1] = ((DataGridView)this.dgOutput).Rows[i].Cells[j].Value.ToString();

//Do the colors
if (((DataGridView)this.dgOutput).Rows[i].Cells[j].Value.ToString() == "Update OK")
{
((Range)r.Cells[i + 1, 1]).Font.Color = Color.Green.G;
}
}
}
}
catch (Exception EX) //user closes the Excel file while it is loading data from the datagrid
{
MessageBox.Show(EX.Message + "The Excel file was closed while loading data from the datagrid.",
"Error : Loading file!!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}

Mvelo Walaza
Developer
Telkom SA

I don't see why not. You just have to loop through the tabpages. You have to know your logic. I don't have time to work on the code but here is what should work:

<br />
//loop through each tabpage in tabcontrol.tabpages<br />
foreach(TabPage page in tabcontrol.TabPages)<br />
{<br />
//get the datagrid from the tabpage's control. It may not be at the 0 index but it should be in there<br />
DataGridView dgv = (DataGridView)page.Controls[0];<br />
<br />
     //loop through each datarow in datagridview<br />
     foreach(DataGridViewRow row in dgv.Rows)<br />
     {<br />
          //create new worksheet<br />
<br />
          //load data from datagrid to worksheet<br />
<br />
          //add worksheet to workbook<br />
     }<br />
<br />
}<br />

Good luck

Lester
http://www.lestersconyers.com

modified on Wednesday, April 9, 2008 9:40 AM

Hi,
These are the errors I get when I try the code you suggested:
1.
foreach statement cannot operate on variables of type 'System.Windows.Forms.TabControl' because 'System.Windows.Forms.TabControl' does not contain a public definition for 'GetEnumerator'

2.
foreach statement cannot operate on variables of type 'System.Windows.Forms.DataGridView' because 'System.Windows.Forms.DataGridView' does not contain a public definition for 'GetEnumerator'

Is there anything I am missing?

Mvelo Walaza
Developer
Telkom SA

I edited the code. Try it.

Lester
http://www.lestersconyers.com

I tried the code but when I click the button nothing happens. What could I be doing wrong? Here is the code:

//This exports data from the datagrid to a new EXCEL spreadsheet
private void btnExport_Click(object sender, EventArgs e)
{
//Check if the file has been added to the datagrid
if (dgOutput.RowCount == 1)
{
MessageBox.Show("Please load the file first!!", "Error : Load file!!",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
TabControl tbControl = new TabControl();

//loop through each tabpage in tabcontrol.tabpages
foreach (TabPage page in tbControl.TabPages)
{
//get the datagrid from the tabpage's control. It may not be at the 0 index but it should be in there
DataGridView dgv = (DataGridView)page.Controls[0];

//loop through each datarow in datagridview
foreach (DataGridViewRow row in dgv.Rows)
{
//create new worksheet
Microsoft.Office.Interop.Excel._Application _appClass = new ApplicationClass();
_appClass.Visible = true;

_appClass.Caption = "Exported ECS Errors";

Microsoft.Office.Interop.Excel.Workbook wbk = _appClass.Workbooks.Add(XlWBATemplate.xlWBATWorksheet);

Worksheet obj = (Worksheet)wbk.ActiveSheet;

// get the collection of sheets in the workbook
Microsoft.Office.Interop.Excel.Sheets sheets = wbk.Worksheets;

Range r = (Range)obj.Cells;

//_appClass.Workbooks.Add(obj);

//load data from datagrid to worksheet
try
{
//Load the Headers and make them BOLD
for (int i = 0; i < ((DataGridView)this.dgOutput).Columns.Count; i++)
{
r[1, i + 1] = ((DataGridView)this.dgOutput).Columns[i].HeaderText.ToString();
((Range)r.Cells[1, i + 1]).Font.Bold = true;
}

//Load the data from the datagrid to the new spreadsheet
for (int i = 1; i < ((DataGridView)this.dgOutput).Rows.Count - 1; i++)
{
for (int j = 0; j < ((DataGridView)this.dgOutput).Columns.Count; j++)
{

r[i + 1, j + 1] = ((DataGridView)this.dgOutput).Rows[i].Cells[j].Value.ToString();

//Do the colors
if (((DataGridView)this.dgOutput).Rows[i].Cells[j].Value.ToString() == "Update OK")
{
((Range)r.Cells[i + 1, 1]).Font.Color = Color.Green.G;
}
}
}
}
catch (Exception EX) //user closes the Excel file while it is loading data from the datagrid
{
MessageBox.Show(EX.Message + "The Excel file was closed while loading data from the datagrid.",
"Error : Loading file!!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}

//add worksheet to workbook
_appClass.Workbooks.Add(sheets);
}

}
}
}

Mvelo Walaza
Developer
Telkom SA

Just about your whole code needs to be rewritten. I think you're making this harder on yourself than you needed to. The reason nothing is happening is because tbControl is a new tabcontrol with no tabpages. Instead of instantiating a new tabcontrol, you need to loop through the tabpages of the original tabcontrol that you were working with at the beginning.

To save yourself some trouble, let the designer work for you. Simply drag and drop a tabcontrol on the page. Now, it can be accessed globally. Also, ditch that global datagridview named dgOutput. You don't need it and it shouldn't be being used. It shouldn't be being used because you create a new datagridview for each tab page that's created dynamically.

Once you get all that rewired, take a look at your code. Think about exactly what's going to happen. Right now, if that foreach loop would execute, you would only be getting data from this.dgOutput but your looping through the rows of dgv which is the datagridview on each tabpage. You want to loop through the rows of dgv to get values. You want to loop through the columns of dgv to load the headers. Then, after the headers and values are in the worksheet, you want to add it to the workbook.

Set some breakpoints within your loops and the rest of your code to debug. It'll save you alot of time and you'll learn a whole lot quicker than somebody helping you.

Lester
http://www.lestersconyers.com

Hiii,

How to write a text in a video files?I want to stamp time in the video files.Plsssssssss help me.

Thanks in advance
Smithakrishnan

Hello. I'm working with a custom treeview control for a project and everything works fine. However, I have a little problem. Whenever I add add the treeview to a form and click something else, I can no longer select it with the mouse unless I add a tab page to it. This is getting pretty annoying because I'm actually working with 3 custom treeviews and they all have this same problem. This makes it pretty difficult to be productive.

Any suggestions?

Lester
http://www.lestersconyers.com

Can ne1 tell me how to synchronize my database using gprs???m usin c# .net compact framework.

Who, on this earth, is "ne1" and why have you directed your question specifically at this person??

(There'a hint buried in this post, if it wasn't obvious)

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Dave Kreskowiak wrote:
Who, on this earth,

with the advent of wireless internet, ne1 could be newhere... Big Grin | :-D

Luc Pattyn [Forum Guidelines] [My Articles]

This month's tips:
- before you ask a question here, search CodeProject, then Google;
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get;
- use PRE tags to preserve formatting when showing multi-line code snippets.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

I'm trying merge DataTable "db2_table1" into to DataTable "db1_table1". But it doen't seem to work. Any help will be appreciated....

<br />
public class MergeTableClass<br />
    {<br />
        private OleDbDataAdapter da1, da2;<br />
        private DataSet ds1;<br />
<br />
        public void MergeTables(string connS1, string connS2)<br />
        {<br />
            string connString1 = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + connS1;<br />
            string connString2 = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + connS2;<br />
            OleDbConnection oleConn1 = new OleDbConnection(connString1);<br />
            OleDbConnection oleConn2 = new OleDbConnection(connString2);<br />
            string cmd1 = "SELECT *FROM db1_table1";<br />
            string cmd2 = "SELECT *FROM db2_table1";<br />
            da1 = new OleDbDataAdapter(cmd1, oleConn1);<br />
            da2 = new OleDbDataAdapter(cmd2, oleConn2);<br />
            ds1 = new DataSet();<br />
            <br />
            da1.Fill(ds1,"db1_table1");<br />
            da2.Fill(ds1,"db2_table1");<br />
                                    <br />
            ds1.Tables["db1_table1"].Merge(ds1.Tables["db2_table1"]);<br />
            da1.Update(ds1,"db2_table1");<br />
            ds1.AcceptChanges();<br />
            <br />
          }<br />
    }<br />

I think you're calling Update() on "db2_table1." Should you be calling it on "db1_table1"?

Lester
http://www.lestersconyers.com

I have tried both...still doens't work. Sniff | :^)

Oh ok. I think you just need to create a new command object with an update command. Then set the UpdateCommand of the adapter equal to that command object.

Lester
http://www.lestersconyers.com

I tried to create a OleDbCommandBuilder but it still didn't work...

OleDbCommandBuilder cmdBld = new OleDbCommandBuilder(da1);

What did you do next?

da1.UpdateCommand = cmdBld.GetUpdateCommand();
?

Lester
http://www.lestersconyers.com

Nothing yet...

public void MergeTables(string connS1, string connS2)
{
string connString1 = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + connS1;
string connString2 = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + connS2;
OleDbConnection oleConn1 = new OleDbConnection(connString1);
OleDbConnection oleConn2 = new OleDbConnection(connString2);
string cmd1 = "SELECT *FROM db1_table1";
string cmd2 = "SELECT *FROM db2_table1";
da1 = new OleDbDataAdapter(cmd1, oleConn1);
da2 = new OleDbDataAdapter(cmd2, oleConn2);
ds1 = new DataSet();

da1.Fill(ds1, "db1_table1");
da2.Fill(ds1, "db2_table1");

ds1.Tables["db1_table1"].Merge(ds1.Tables["db2_table1"]);

OleDbCommandBuilder cmdBld = new OleDbCommandBuilder(da1);
da1.UpdateCommand = cmdBld.GetUpdateCommand();
@da1.Update(ds1, "db1_table1");
ds1.AcceptChanges();

}

Found it..

The problem was that after the Merge none of the rows in data table had the state RowState Changed or Added. The update methon had nothing to apply.

This peace of code made the whole class work as it should:

foreach (DataRow row in ds1.Tables["db2_table1"].Rows)<br />
       row.SetAdded();

Thanks

hi I am using a combobox to load items using datatable. i am using sqlserver2005.when i tried to load a count of 32500 rows in a combobox , my application hangs more than for 5 min.

Any body give me solution.
Below is my code:

<br />
private void _popItemCombo() //To load itemcode combobox <br />
        {<br />
            clsGrpObj = new clsGroupManip();<br />
            clsDataAccObj = new clsGloDataAcces();<br />
//code to populate datatable Item table<br />
            dtItem = new DataTable(); //stores item * datas<br />
            dtItem = clsGrpObj._selItem_Assembly();<br />
            for (int i = 0; i < dtItem.Rows.Count - 1; i++)<br />
            {<br />
                string item = dtItem.Rows[i]["ItemCode"].ToString();<br />
                cmbItemCode.Items.Add(item); // code to pop combobox with datas.<br />
            }<br />
           <br />
        }<br />

help me,

Thank u

kssk

You should use cmbItemCode.DateSource = dtItem and set the DisplayMember and ValueMember instead.

Any auto search on the combobox? I would have to scroll 30000 rows on 8 items drop down to select a customer.... Smile | :)