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add values of datatable to DataGridView c#

Posted on 2009-05-09
Medium Priority
Last Modified: 2012-05-06
hi all,

I have a datatable wich contains +20 columns. I need all the data from these columns but I only want to display 5 of them in my DataGridView.
So I've created  5 columns in the DGV and try to add the values of the specified columns in the datatable to it.
Problem 1: I only get the column name in the dgvcolumns instead of the value.
Problem 2: when I doubleClick a Row in the DGV I want to get all the +20 columns from the datatable in local vars.

Below some code how I try to fill my DGV with the 5 columns from the DT.

And how can I solve problem nr2?


DataSet DsDocs = _LocalDocBLL.GetDocuments(1);
        if (DsDocs.Tables[0].Rows.Count > 0)
          // fill dataGridView
          //dataGridViewOffertes.DataSource = DsDocs.Tables[0];
          DataTable myDT = DsDocs.Tables[0];
         for (int i = 0; i < myDT.Rows.Count; i++)
           dataGridViewOffertes.Rows[i].Cells["id"].Value = myDT.Columns["doc_id"];
           dataGridViewOffertes.Rows[i].Cells["bedrag"].Value = myDT.Columns["doc_eindBedragDocument"];

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Question by:Pit76
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LVL 12

Accepted Solution

Munawar Hussain earned 1500 total points
ID: 24345218

there could be a lots of possibilities . here is one out of them.

Create dataset or datatable.
bind datatable to gridview but make the columns mapping hidden that you dont want to be displayed.

like this

 DsDocs.Tables[0].Columns[0].ColumnMapping = MappingType.Hidden;
 DsDocs.Tables[0].Columns[1].ColumnMapping = MappingType.Hidden;


Now to get values in doubleClick.... just use the currentRow.Index to get specific data row from table

like this
private void dataGridViewOffertes_CellMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e)
            string myfirstColumnVAlue =DsDocs.Tables [0].Rows [e.RowIndex ]["< name of first column >"]
            string my2ndColumnVAlue =DsDocs.Tables [0].Rows [e.RowIndex ]["< name of 2nd column >"]

I have made DsDocs a class member instead loacal, so that its available on whole form.



Author Comment

ID: 24347382
Hi,  thx for your comment.

I was able to solve problem nr 2 on  my own. I just take the value of the ID column of the doubleClicked row and then perform a Select on my DT to search for the row with the matiching ID.
Then I fill a structure with the values of the row found.

About problem nr1: tried your solution on a number of columns and that works. But I only want 5 columns of the 40 in my dataset to show up in the DGV. So this would be lot's of work to do it like this.

Can you see what I'm doing wrong in my original solution. I want to loop throught the DS and add for each row find the values of the 5 columns to the DGV. It works but I don't get the value, only the rowheadertext shows up in all rows.

// Solution prob nr2
// Get doc_id selected document
      DataGridViewRow dr = dataGridViewOffertes.SelectedRows[0];
      int doc_Id = Convert.ToInt32(dr.Cells["id"].Value);
      // find DataTableRow with the doc_id in myDT
      DataRow[] row = myDT.Select("[doc_id] = " + doc_Id);
      // fill docStruct with values from myDT
      #region Fill docStruct
      docStruct.id = Convert.ToInt32(row[0]["doc_id"]);
      docStruct.type_id = Convert.ToInt32(row[0]["doc_type_id"]);
      docStruct.btw_id = Convert.ToInt32(row[0]["doc_btw_id"]);
for (int i = 0; i < myDT.Rows.Count; i++)
           dataGridViewOffertes.Rows[i].Cells["id"].Value = myDT.Columns["doc_id"];
           dataGridViewOffertes.Rows[i].Cells["bedrag"].Value = myDT.Columns["doc_eindBedragDocument"];

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Author Comment

ID: 24347465

I found the solution to my first prob to.
I needed to map the column value from my dataset to the DGV like this instead of what I tried earlier.

Grts and thx for your help on a saturday :)

dataGridViewOffertes.Rows[i].Cells["id"].Value = DsDocs.Tables[0].Rows[i]["doc_id"] ;

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Author Closing Comment

ID: 31579759
I found the answers myself but thx for your time. :)
LVL 12

Expert Comment

by:Munawar Hussain
ID: 24351078

nice to know that you was able to resolve....

I was not online when you posted comments otherwise I could have posted response as the issue was not very critical



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