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c# Select all checkbox with datagridview using dataset

This is a basic question but i didn't find appropriate answers : I have a dataset that is shown in dataGridview and it contains a column Is_Alarm of type bit (boolean) , i want to insert a Select all checkbox in that column.
I have seen many solutions but they are all about inserting a new checkbox in datagridView .
What i want is insert it after columns are shown , here's my code :
SqlDataAdapter adap= new SqlDataAdapter(select_query,con);
ds = new DataSet();
adap.Fill(ds, "Event_test");
dataGridView1.DataSource = ds.Tables[0];

I had same issue what I did might be useful for you
This is code used for gridview
<asp:GridView ID="GridView1" runat="server" EnableModelValidation="True">
<Columns>
<asp:TemplateField>
<EditItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" />
</EditItemTemplate>
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Next I Loaded data( MyTable field had id,username,email etc)
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
con.Open();
SqlDataAdapter adap = new SqlDataAdapter("Select * From UserInfo", con);
DataSet ds = new DataSet();
adap.Fill(ds);
con.Close();
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();
}
}
For getting Ids of selected records I used few lines which is described here
http://www.aspsnippets.com/Articles/GridView-with-CheckBox-Get-Selected-Rows-in-ASPNet.aspx and modified in this way
protected void btnCheckSelected_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in GridView1.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
CheckBox chkRow = (row.Cells[0].FindControl("CheckBox1") as CheckBox);
if (chkRow.Checked)
{
string ids = row.Cells[1].Text;
ListBox1.Items.Add(ids);
}
}
}
}

how to bind two columns of a database table up and down as a single column in data gridview

how to bind two columns of a database table UP and DOWN as a single column in data gridview.
Kindly help me.

.ASPX:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:TemplateField>
<HeaderTemplate>
<span>Merged cell</span>
</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="lblMergedField" runat="server" Text='<%# Eval("ID") + " - " + Eval("City") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Code behind:
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
BindData();
}
private void BindData()
{
string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
using (var con = new SqlConnection(connectionString))
{
using (var command = new SqlCommand("SELECT ID,City FROM Cities", con))
{
using (var adapter = new SqlDataAdapter(command))
{
con.Open();
var table = new DataTable();
adapter.Fill(table);
GridView1.DataSource = table;
GridView1.DataBind();
con.Close();
}
}
}
}
Output:

I want to do sorting on based on column of gridview, but event is not firing when I click on header of HeaderTemplete

I have created one gridview with custom column and want to perform sorting on them. When I click on column then no event is firing for sorting.
Below is the code which I have written
For .aspx page
<asp:GridView ID="grdConfigureCustomers" runat="server" AlternatingRowStyle- BackColor="Aqua" Width="1300px"
OnRowCommand="grdConfigureCustomers_RowCommand" OnRowEditing="grdConfigureCustomers_RowEditing"
OnRowUpdating="grdConfigureCustomers_RowUpdating" OnRowCancelingEdit="grdConfigureCustomers_RowCancelingEdit"
AutoGenerateColumns="false" AllowPaging="true" PageSize="5"
OnRowDeleting="grdConfigureCustomers_RowDeleting" ShowFooter="true"
onpageindexchanging="grdConfigureCustomers_PageIndexChanging" OnSorting="grdConfigureCustomers_Sorting" AllowSorting="true">
<HeaderStyle BackColor="AliceBlue" />
<Columns>
<asp:TemplateField HeaderText="Customer ID">
<ItemTemplate>
<asp:Label ID="lblCustomerId" runat="server" Text='<%# Eval("Customer_ID") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtAddCustomerId" runat="server"></asp:TextBox><span style="color:Red;">*</span>
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
For .aspx.cs page
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
LoadCustomerConfigurationGridView();
}
}
private void LoadCustomerConfigurationGridView()
{
DataTable dt = new DataTable();
dt = sqlHelper.GetCustomerListInformation();
grdConfigureCustomers.DataSource = dt;
grdConfigureCustomers.DataBind();
Session["data"] = dt;
}
private void LoadCustomerConfigurationGridView(string srtexpr, string direc)
{
DataTable dt = new DataTable();
dt = sqlHelper.GetCustomerListInformation();
DataView dv = new DataView(dt);
dv.Sort = srtexpr + " " + direc;
grdConfigureCustomers.DataSource = dv;
grdConfigureCustomers.DataBind();
Session["data"] = dt;
}
protected void grdConfigureCustomers_Sorting(object sender, GridViewSortEventArgs e)
{
switch (e.SortExpression)
{
case "DateLogged":
if (e.SortDirection == SortDirection.Ascending)
{
LoadCustomerConfigurationGridView("DateLogged", "ASC");
}
else
{
LoadCustomerConfigurationGridView();
}
break;
}
}
Please let me know what I missed for sorting. Thanks in advance.

You need to specify the SortExpression property in the TemplateField like this:
<asp:TemplateField HeaderText="Customer ID" SortExpression="Customer_ID">

You need to enable sorting. EnableSorting="true" in your asp.net:Gridview.

How to delete a row from DB (*.mdb) in c#

I have an access DB (.mdb) named: Programs, with one table named: Data. By using the DataGridView I present the data from the table Data. I want to delete a row from the DataGridView and from the DB during runtime. Does anyone know how to do that (using C#)?
Another question I have is, who can i run queries on my DB?
thanks!

Very simple.
I suppose in your datagrid you have a check box by choosing which you will be able to choose the rows that you want to delete. And assuming you have a submit button, so after choosing the rows click on the submit button. In the button's click event call the Delete query say delete from tblname where id = #id [#id is the id that will be passed from your grid]
After that just populate the grid e.g. select * from tblname
e.g.
Aspx code
<asp:GridView runat="server" ID="gvTest" Width="100%" AutoGenerateColumns="false">
<Columns>
<asp:TemplateField HeaderText="Select" ItemStyle-HorizontalAlign="Center" ItemStyle-Width="5%">
<ItemTemplate>
<asp:CheckBox ID="chkDel" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="RegID" DataField="RegID" ItemStyle-Width="10%">
<ItemStyle HorizontalAlign="Left"/>
</asp:BoundField>
<asp:TemplateField HeaderText="Name" ItemStyle-Width="22%" ItemStyle-HorizontalAlign="Left">
<ItemTemplate>
<asp:Label ID="lblName" runat="server" Width="100%" Text= '<%# DataBinder.Eval(Container.DataItem, "UserName")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<br>
<asp:Button runat="server" ID="btnSubmit" Text="Submit" OnClick="btnSubmit_Click"></asp:Button>
Submit button cilck event's code
protected void btnSubmit_Click(object sender, EventArgs e)
{
for (int count = 0; count < gvTest.Rows.Count; count++ )
{
CheckBox chkSelect = (CheckBox)gvTest.Rows[count].FindControl("chkDel");
if (chkSelect != null)
{
if (chkSelect.Checked == true)
{
//Receiveing RegID from the GridView
int RegID = Int32.Parse((gvTest.Rows[count].Cells[1].Text).ToString());
object result = DeleteRecord(RegID); //DeleteRecord Function will delete the record
}
}
}
PopulateGrid(); //PopulateGrid Function will again populate the grid
}
public void DeleteRecord(int RegId)
{
string connectionPath = "Data Source=<your data source>;Initial Catalog=<db name>;Integrated Security=True;userid='test';pwd='test'";
string command = "";
SqlConnection connection = new SqlConnection(#connectionPath);
command = "delete from tblname where id = " + RegId
try
{
connection.Open();
SqlCommand cmd = new SqlCommand(command, connection);
cmd.ExecuteNonQuery();
}
catch (SqlException sqlExcep) {}
finally
{
connection.Close();
}
}
public void PopulateGrid()
{
DataTable dt = new DataTable();
dt = GetRecord();
if(dt !=null && dt.rows.count>0)
{
gvTest.DataSource = dt;
gvTest.DataBind();
}
}
public DataTable GetRecord()
{
string connectionPath = "Data Source=<your data source>;Initial Catalog=<db name>;Integrated Security=True;userid='test';pwd='test'";
string command = "";
SqlDataAdapter adapter = new SqlDataAdapter();
SqlConnection connection = new SqlConnection(#connectionPath);
command = "Select * from tblname" ;
connection.Open();
SqlCommand sqlCom = new SqlCommand(command, connection);
adapter.SelectCommand = sqlCom;
DataTable table = new DataTable();
adapter.Fill(table);
return table;
}
Hope this makes sense.

Dont want textbox to enter null value in datatable

I have a data table which already has some values, plus it is getting values from a textbox below.
Now my problem is when i dont enter a value in the textbox it still enters in the data table.
I dont want it to do that..
The code can run on any machine... any suggestions????
Thanks
public partial class WebForm6 : System.Web.UI.Page
{
DataTable dt;
protected void Page_Load(object sender, EventArgs e)
{
// Initialize a DataTable
if (!Page.IsPostBack)
{
dt = new DataTable();
// Initialize DataColumn
DataColumn myDataColumn = new DataColumn();
//// initialize a new instance of DataColumn to add another column with different properties.
//myDataColumn = new DataColumn();
myDataColumn.ColumnName = "firstName";
// set DataType property of the column as String
myDataColumn.DataType = System.Type.GetType("System.String");
// Add and Create a Second DataColumn
dt.Columns.Add(myDataColumn);
// create a new row using NewRow() function of DataTable.
// dataRow object will inherit the schema of myDataTable to create a new row
DataRow dataRow = dt.NewRow();
dataRow["firstName"] = "John";
// add new data row to the data table.
dt.Rows.Add(dataRow);
// similarly adds the second row to the DataTable
dataRow = dt.NewRow();
dataRow["firstName"] = "Will";
dt.Rows.Add(dataRow);
Session["data"] = dt;
GridView1.DataSource = dt;
GridView1.DataBind();
}
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
if (Session["Data"] == null)
{
dt.Columns.Add("firstName");
BindtoGridViewFromTextBoxes(dt);
ClearControls();
}
else
{
dt = (DataTable)Session["Data"];
BindtoGridViewFromTextBoxes(dt);
ClearControls();
}
} private void ClearControls()
{
txtName.Text = String.Empty;
}
private void BindtoGridViewFromTextBoxes(DataTable dt)
{
DataRow dr;
dr = dt.NewRow();
dr["firstName"] = txtName.Text.ToString();
dt.Rows.Add(dr);
Session["Data"] = dt;
GridView1.DataSource = dt;
GridView1.DataBind();
}
and on .aspx page
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
<asp:TemplateField>
<EditItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" />
</EditItemTemplate>
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="First Name">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("firstName") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("firstName") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
any help....??

Change your method to be this:
private void BindtoGridViewFromTextBoxes(DataTable dt)
{
if (!String.IsNullOrEmpty(txtname.Text))
{
DataRow dr = dt.NewRow();
dr["firstName"] = txtName.Text;
dt.Rows.Add(dr);
Session["Data"] = dt;
}
GridView1.DataSource = dt;
GridView1.DataBind();
}