Develop Reference

Select Values from checked DataGridView Items

I have my code as follows:
DataGridViewCheckBoxColumn chk = new DataGridViewCheckBoxColumn();
actGrid.Columns.Add(chk);
chk.HeaderText = "Select";
chk.Name = "select";
chk.ReadOnly = false;
DataGridViewTextBoxColumn mc_no = new DataGridViewTextBoxColumn();
actGrid.Columns.Add(mc_no);
mc_no.HeaderText = "M/C Number";
mc_no.Name = "mc_no";
mc_no.Width = 200;
mc_no.ReadOnly = true;
DataGridViewTextBoxColumn act_name = new DataGridViewTextBoxColumn();
actGrid.Columns.Add(act_name);
act_name.HeaderText = "Name";
act_name.Name = "member";
act_name.Width = 262;
act_name.ReadOnly = true;
while (DR.Read())
{
actGrid.Rows.Add(true, DR.GetInt32(0).ToString(), DR.GetString(2) + " " + DR.GetString(1));
}
Which produces the following output:
And now I want to perform some actions based on which accounts were selected (by toggling the trailing checkboxes), especially M/C Number.

// iterate over DataGridView rows
foreach (DataGridViewRow row in actGrid.Rows)
{
// check, if row is selected by checkbox
if (Equals(row.Cells["select"].Value, true))
{
// get values for selected row
var mc_no_Value = (string)row.Cells["mc_no"].Value;
var member_Value = (string)row.Cells["member"].Value;
// do smth with values here
}
}

How i can update my second combobox when "SelectedItem" is changed

I've two comboboxes in a form, the first combobox display each "mark" of truck and second may display the models of each "mark". For example if mark is volvo the second combobox may display "FH, FH6 ...", otherwise if mark is "MAN" the second combobox may display "TGX, TGX 38" ...
I've try to do a cycle to refesh my second combobox, each time, that the first combobox is changed.
while (comboBox1.SelectedIndex == -1)
{
comboBox2.Items.Clear();
if (comboBox1.SelectedIndex == 1)
{
comboBox2.DisplayMember = "Modelo";
comboBox2.DataSource = d.Tables["Modelos-MAN"].DefaultView;
}
if (comboBox1.SelectedIndex == 2)
{
comboBox2.DisplayMember = "ModeloV";
comboBox2.DataSource = d.Tables["Modelos-VOLVO"].DefaultView;
comboBox2.Refresh();
}
}
if (comboBox1.SelectedIndex==1)
{
comboBox2.DisplayMember = "Modelo";
comboBox2.DataSource = d.Tables["Modelos-MAN"].DefaultView;
}
if(comboBox1.SelectedIndex == 2)
{
comboBox2.DisplayMember = "ModeloV";
comboBox2.DataSource = d.Tables["Modelos-VOLVO"].DefaultView;
comboBox2.Refresh();
}
Happens that if i select "MAN", it shows "MAN" models and then if i change, and select "Volvo", the second combobox show me "System.Data.DataRowView".
What is happening?How i can solve this?
Note: I've also, a method to generate truck "mark" and "models":
public DataSet LoadMarkAndModel()
{
var marcas = new string[6];
marcas[0] = "Marca ...";
marcas[1] = "MAN";
marcas[2] = "Volvo";//Linha 2 coluna 2
marcas[3] = "DAF";
marcas[4] = "Renault";//Linha 4 coluna 2
marcas[5] = "Mercedes-Benz";
var modelosMAN = new string[7];
var modelosVolvo = new string[5];
modelosMAN[0] = "TGX";
modelosMAN[1] = "TGX D38";
modelosMAN[2] = "TGX EfficientLine 2";
modelosMAN[3] = "TGS";
modelosMAN[4] = "TGA";
modelosMAN[5] = "TGA-WW";
modelosMAN[6] = "TGM";
modelosVolvo[0] = "FH16";
modelosVolvo[1] = "FH";
modelosVolvo[2] = "FM";
modelosVolvo[3] = "FE";
modelosVolvo[4] = "FL";
DataSet data = new DataSet("DataSetOfTrucks");
DataTable table = new DataTable("Marcas");
DataColumn colunaID = new DataColumn("ID", typeof(int));
DataColumn colunaMarca = new DataColumn("Marca", typeof(string));
//table.Columns.Add("Description", typeof(string));
table.Columns.Add(colunaID);
table.Columns.Add(colunaMarca);
for (int i = 0; i < marcas.Length; i++)
{
DataRow manyMark = table.NewRow();
manyMark["ID"] = i + 1;
manyMark["Marca"] = marcas[i];
table.Rows.Add(manyMark);
}
data.Tables.Add(table);
DataTable modelsTable = new DataTable("Modelos-MAN");
DataColumn modelsIDParent = new DataColumn("IDP", typeof(int));
DataColumn modelo = new DataColumn("Modelo", typeof(string));
modelsTable.Columns.Add(modelsIDParent);
modelsTable.Columns.Add(modelo);
int m = 0;
while (m<modelosMAN.Length)
{
DataRow manyModelsMAN = modelsTable.NewRow();
manyModelsMAN["IDP"] = 1;
manyModelsMAN["Modelo"] = modelosMAN[m];
modelsTable.Rows.Add(manyModelsMAN);
m++;
//if (m > modelosMAN.Length)
// break;
}
data.Tables.Add(modelsTable);
////vOLVO
DataTable modelsTableVOLVO = new DataTable("Modelos-VOLVO");
DataColumn modelsIDParentVOLVO = new DataColumn("IDPVolvo", typeof(int));
DataColumn modeloVolvo = new DataColumn("ModeloV", typeof(string));
modelsTableVOLVO.Columns.Add(modelsIDParentVOLVO);
modelsTableVOLVO.Columns.Add(modeloVolvo);
int count = 0;
while (count < modelosVolvo.Length)
{
DataRow manyModelsVolvo = modelsTableVOLVO.NewRow();
manyModelsVolvo["IDPVolvo"] = 2;
manyModelsVolvo["ModeloV"] = modelosVolvo[count];
modelsTableVOLVO.Rows.Add(manyModelsVolvo);
count++;
}
data.Tables.Add(modelsTableVOLVO);
return data;
}

comboBox1_SelectedIndexChanged()
{
comboBox2.DataSource =null;
if (comboBox1.SelectedIndex==1)
{
comboBox2.DataSource = d.Tables["Modelos-MAN"];
comboBox2.ValueMember="Modelo";
comboBox2.DisplayMember = "Modelo";
}
if(comboBox1.SelectedIndex == 2)
{
comboBox2.DataSource = d.Tables["Modelos-VOLVO"];
comboBox2.DisplayMember = "ModeloV";
comboBox2.ValueMember = "ModeloV";
}
}

Why am I getting a DuplicateNameException?

I am currently making a ASP.NET MVC application for users to upload other users to a database from csv and excel.
And while working on the csv-uploader method I have come across a problem where the TextFieldParser - csvReader only reads the first column name and then move on to try and add it to every column in the DataTable and thus it gives the "DuplicateNameException in System.Data.dll".
And I have tried to find a counter that helps against this and i have also changed the delimiter type resulting in every column staying in the first DataTable column instead, meaning that the delimiters is not the problem.
And there is a breakpoint so I could see that the colFields counter manages to find all columns in the csv-file though it only tries to add the first one to the DataTable.
When searching for the problem the only thing I come accross is when there is deliberate code to try and implement the same column over and over, but I do not think that I have anything like that.
The method just stop trying to add the next column and tries to add the same first one instead.
And as a result there is the "DuplicateNameException",
anyone can see why that is?
Here is my code and it is placed in a controller:
[HttpPost]
public ActionResult Import(HttpPostedFileBase file)
{
DataTable csvData = new DataTable();
if (file != null && file.ContentLength > 0)
{
try
{
using (TextFieldParser csvReader = new TextFieldParser(file.InputStream))
{
//TODO:Skapa en lista eller liknande för delimiter val om möjligt.
csvReader.SetDelimiters(new string[] { ";" });
csvReader.HasFieldsEnclosedInQuotes = false;
string[] colFields = csvReader.ReadFields();
foreach (string column in colFields)
{
//TODO:Nuvarande error: DuplicateNameException, den lägger Author title på två olika kolumner och ger exception när detta upptäcks.
DataColumn Titel = new DataColumn(column);
Titel.AllowDBNull = true;
csvData.Columns.Add(Titel);
DataColumn FirstName = new DataColumn(column);
FirstName.AllowDBNull = true;
csvData.Columns.Add(FirstName);
DataColumn LastName = new DataColumn(column);
LastName.AllowDBNull = true;
csvData.Columns.Add(LastName);
DataColumn AbstrNum = new DataColumn(column);
AbstrNum.AllowDBNull = true;
csvData.Columns.Add(AbstrNum);
DataColumn PosterTitel = new DataColumn(column);
PosterTitel.AllowDBNull = true;
csvData.Columns.Add(PosterTitel);
DataColumn Workshop = new DataColumn(column);
Workshop.AllowDBNull = true;
csvData.Columns.Add(Workshop);
DataColumn Keywords = new DataColumn(column);
Keywords.AllowDBNull = true;
csvData.Columns.Add(Keywords);
DataColumn Institution = new DataColumn(column);
Institution.AllowDBNull = true;
csvData.Columns.Add(Institution);
DataColumn CollabEmail = new DataColumn(column);
CollabEmail.AllowDBNull = true;
csvData.Columns.Add(CollabEmail);
}
while (!csvReader.EndOfData)
{
string[] fieldData = csvReader.ReadFields();
//Making empty value as null
for (int i = 0; i < fieldData.Length; i++)
{
if (fieldData[i] == "")
{
fieldData[i] = null;
}
}
csvData.Rows.Add(fieldData);
}
}
//Fortfarande i try...
SqlConnectionStringBuilder cb = new SqlConnectionStringBuilder();
cb.DataSource="HELMER/SQLEXPRESS";
cb.InitialCatalog="TestDB";
cb.IntegratedSecurity=true;
SqlConnection cnn = new SqlConnection(cb.ConnectionString);
SqlCommand cmd = new SqlCommand("SELECT * FROM csvData", cnn);
cnn.Open();
SqlDataReader rdr=cmd.ExecuteReader();
SqlBulkCopy sbc= new SqlBulkCopy("server=.;database=TestDB;" + "Integrated Security=SSPI");
sbc.DestinationTableName = "Users";
sbc.WriteToServer(rdr);
sbc.Close();
rdr.Close();
cnn.Close();
}
catch (Exception ex)
{
}
}
return RedirectToAction("Index", "Home", new { Message = "The Import was a success" });
}
I have taken some source material from this site:
http://www.morgantechspace.com/2013/10/import-csv-file-into-sql-server-using.html
And also I am still pretty new to this site, though it has been a week right about if there is anything I am doing wrong.

Try this :
foreach (string column in colFields)
{
DataColumn datecolumn = new DataColumn(column);
datecolumn.AllowDBNull = true;
csvData.Columns.Add(datecolumn);
}
Once you created the columns from colFields and you can add rows to the created columns.
while (!csvReader.EndOfData)
{
string[] fieldData = csvReader.ReadFields();
//Making empty value as null
for (int i = 0; i < fieldData.Length; i++)
{
if (fieldData[i] == "")
{
fieldData[i] = null;
}
}
csvData.Rows.Add(fieldData); // Here rows are added to the created columns
}
}

Bind DataGridviewComboBoxCell into DataGridViw

I have to bind each cell of rows with different data like.
ProductID Color(DataGridviewComboBoxColumn)
1 Red - (ComboboxCell having value only Red,Black,Green and Red is Selected)
....
4 Yellow- (ComboboxCell having value only Yellow,Gold and Yellow is Selected)
When I bind Items of cell and debug it will show Items in DataGridviewComboBoxCell but when going to run application it will display blank on select Combobox.
What can i do for this?
Form Design
private void InitializeComponent()
{
this.dataGridView2 = new System.Windows.Forms.DataGridView();
this.ProductId = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.Color = new System.Windows.Forms.DataGridViewComboBoxColumn();
this.ColorIds = new System.Windows.Forms.DataGridViewTextBoxColumn();
((System.ComponentModel.ISupportInitialize)(this.dataGridView2)).BeginInit();
this.SuspendLayout();
//
// dataGridView2
//
this.dataGridView2.AllowUserToAddRows = false;
this.dataGridView2.AllowUserToDeleteRows = false;
this.dataGridView2.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.dataGridView2.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
this.ProductId,
this.Color,
this.ColorIds});
this.dataGridView2.Location = new System.Drawing.Point(12, 12);
this.dataGridView2.Name = "dataGridView2";
this.dataGridView2.Size = new System.Drawing.Size(704, 312);
this.dataGridView2.TabIndex = 1;
//
// ProductId
//
this.ProductId.DataPropertyName = "ProductId";
this.ProductId.HeaderText = "ProductId";
this.ProductId.Name = "ProductId";
//
// Color
//
this.Color.HeaderText = "Color";
this.Color.Name = "Color";
this.Color.Resizable = System.Windows.Forms.DataGridViewTriState.True;
this.Color.SortMode = System.Windows.Forms.DataGridViewColumnSortMode.Automatic;
//
// ColorIds
//
this.ColorIds.DataPropertyName = "ColorIds";
this.ColorIds.HeaderText = "ColorIds";
this.ColorIds.Name = "ColorIds";
this.ColorIds.Visible = false;
}
Code :
dataGridView2.AutoGenerateColumns = false;
DataTable dt = //data from Product Table
dataGridView2.DataSource = dt;
DataTable dtColors = //data from Color Table
for (int i = 0; i < dataGridView2.Rows.Count; i++)
{
String ColorIds = dataGridView2.Rows[i].Cells["ColorIds"].Value.ToString();
DataTable dtfiltered = dtColors.Select("ColorId IN (" + ColorIds + ")").CopyToDataTable();
DataGridViewComboBoxCell col = (DataGridViewComboBoxCell)dataGridView2.Rows[i].Cells["Color"];
col.Items.Clear();
foreach (DataRow dr in dtfiltered.Rows)
{
col.Items.Add(new ComboBoxItem(dr["ColorId"].ToString(), dr["Color"].ToString()));
}
col.Value = col.Items[0];
}

Datagrid View Button repeat

I have added button to datagrid view but when ever the function is called more than once then new button adds I need to stop this addition
void AddtoGrid()
{
try
{
table = new DataTable();
bcol = new DataGridViewButtonColumn();
bcol.HeaderText = "Action ";
bcol.Text = "Delete";
bcol.Name = "deleteUserButton";
bcol.UseColumnTextForButtonValue = true;
table.Columns.Add("Name");
table.Columns.Add("Type");
table.Columns.Add("Status");
table.Columns.Add("Date Created");
table.Columns.Add("Action");
for (int i = 0; i < userAction.UserName.ToArray().Length; i++)
{
row = table.NewRow();
asc.Add(userAction.UserName[i]);
row["Name"] = userAction.UserName[i];
row["Type"] = userAction.UserType[i];
row["Status"] = userAction.UserStatus[i];
row["Date Created"] = userAction.DateCrea[i];
row["Action"] = bcol.Text;
table.Rows.Add(row);
}
UsersView.DataSource = table;
UsersView.AllowUserToAddRows = false;//To remove extra row at the end
UsersView.Columns.Add(bcol);
}
catch (Exception ca)
{
MessageBox.Show(ca.ToString());
}
}//End Function for Getting Present Users

I'm not quite sure I understand your question, though I believe that you need to encapsulate creation of the new column into it's own method and only call it once - in the constructor for instance.
For example:
void CreateDeleteColumn()
{
bcol = new DataGridViewButtonColumn();
bcol.HeaderText = "Action ";
bcol.Text = "Delete";
bcol.Name = "deleteUserButton";
bcol.UseColumnTextForButtonValue = true;
UsersView.Columns.Add(bcol);
}
That should stop it adding a column every time you populate the list view.
Hope this helps and sorry if I misunderstood.
Tony