Develop Reference

get selected value by drop down list in a repeater by CommandArgument of link button

I have a repeater that in it has one dropdown list and one linkbutton.
I want to get the selected value of the dropdown list by CommandArgument in linkbutton, but it just knows default value of dropdown list.
My code :
<asp:Repeater runat="server" ID="Repeater1" OnItemDataBound="Page_Load2"OnItemCommand="list_ItemCommand" >
<ItemTemplate>
<asp:DropDownList ID="dlPricelist" CssClass="width100darsad dropdownlist" runat="server" AutoPostBack="true" ViewStateMode="Enabled" >
</asp:DropDownList>
<asp:LinkButton ID="btnAddToCart" runat="server" class="btn btn-success btnAddtoCardSinglepage" CommandArgument='<%#Eval("id") %>' CommandName="addtocard">اضافه به سبد خرید</asp:LinkButton>
<asp:Label ID="xxxxxx" runat="server" Text="Label"></asp:Label>
</ItemTemplate>
</asp:Repeater>
Code behind:
protected void Page_Load2(object sender, RepeaterItemEventArgs e)
{
if (!IsPostBack)
{
string id = Request.QueryString["id"].ToString();
DataSet dsselectcategory = BLLTour.left3join(id.Trim().ToString());
var dlPricelist = (DropDownList)e.Item.FindControl("dlPricelist");
dlPricelist.DataSource = dsselectcategory.Tables[0];
dlPricelist.DataTextField = "pricelistPrice";
dlPricelist.DataValueField = "priceid";
dlPricelist.DataBind();
}
}
protected void list_ItemCommand(object source, RepeaterCommandEventArgs e)
{
if (e.CommandName == "addtocard")
{
foreach (RepeaterItem dataItem in Repeater1.Items)
{
Label xxxxxx = (Label)e.Item.FindControl("xxxxxx");
LinkButton btnAddToCart = (LinkButton)e.Item.FindControl("btnAddToCart");
xxxxxx.Text = ((DropDownList)dataItem.FindControl("dlPricelist")).SelectedItem.Text; //No error
}
}
}
I don't know how I should fix it.

You are using very old technology to show data that's not appropriate.
But if you are serious to use it, you must use FindControll method in ItemTemplate of your repeater control. You should find dropdownlist first, and then cast it to a object to be able to use it's value.

ASP.NET Out of bound exception accessing a row in gridview

I have this asp.net control:
<div class="field" style="text-align: center;">
<asp:GridView ID="gvTags" runat="server" AutoGenerateColumns = "false"
OnRowDataBound="OnRowDataBound" OnRowDeleting="OnRowDelete">
<Columns>
<asp:BoundField DataField="tagId" HeaderText="Id" />
<asp:BoundField DataField="name" HeaderText="<%$ Resources:Common, tlblTags %>" />
<asp:CommandField ShowDeleteButton="True" ButtonType="Button" />
</Columns>
</asp:GridView>
</div>
And I bind my datasource like this from a collection retrieved from database:
this.gvTags.DataSource = product.Tags;
this.gvTags.DataBind();
In the OnRowDataBound I create a popup to show up when the delete button is clicked, so the code is this:
protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
string item = e.Row.Cells[1].Text;
foreach (Button button in e.Row.Cells[2].Controls.OfType<Button>())
{
if (button.CommandName == "Delete")
{
button.Attributes["onclick"] = "if(!confirm('Do you want to delete " + item + "?')){ return false; };";
}
}
}
}
This is working fine, I can see the three rows in my browser and all works as expected (the popup is showing with the correct information etc). But the problem is when I accept the popup so the OnRowDelete event is fired.
I want to remove a Tag from the database with a specific tagId, so I need to get the position 0 at the current row, so this is my code to do that:
protected void OnRowDelete(object sender, GridViewDeleteEventArgs e)
{
int index = Convert.ToInt32(e.RowIndex);
GridViewRow row = this.gvTags.Rows[index];
long tagId = Convert.ToInt64(row.Cells[0].Text);
/* Remove the tag */
productService.RemoveTag(productId, tagId);
/* Delete the row from gridview */
this.gvTags.DeleteRow(index);
}
The error I'am getting is in this line: GridViewRow row = this.gvTags.Rows[index];. I'm getting System.ArgumentOutOfRangeException but I don't understand why. The index variable takes a valid int value like 0, 1...
Any ideas on what I'am doing wrong? Thanks.

How to get row data by clicking a image button in a row in an ASP.NET gridview

I have a GridView in a ASP.NET web application, in which I have added image button in each row:
<asp:TemplateField>
<ItemTemplate>
<asp:ImageButton ID="edit" runat="server" CommandArgument='<%# Bind("EmpID") %>' CommandName="edituser" ImageUrl="image/images.jpg"
ToolTip="Edit User Details"> </asp:ImageButton>
</ItemTemplate>
</asp:TemplateField>
Now how I can get the row data from gridview simply by clicking an edit image button in a row?

You have to change the CommandArgument with this one:
CommandArgument="<%# ((GridViewRow) Container).RowIndex %>
Then:
protected void GridView1_RowCommand(object sender,
GridViewCommandEventArgs e)
{
if (e.CommandName == "edituser") /*if you need this
{
// Retrieve the row index stored in the
// CommandArgument property.
int index = Convert.ToInt32(e.CommandArgument);
// Retrieve the row that contains the buttonfrom the Rows collection.
GridViewRow row = GridView1.Rows[index];
// Add code here now you have the specific row data
}
}

Bind all the columns in the label control respectively, and you can get value using findcontrol method at GridView1_SelectedIndexChanged event
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
Label _lblText = (Label)this.GridView1.SelectedRow.FindControl("UR_Desired_Label_ID");
this.TextBox3.Text = _lblText.Text ;
}

How to delete a row without using OnRowDeleted/OnRowDeleting in gridview

Code Behind
public void lbDelete_Click(object sender, EventArgs e)
{
LinkButton lb = sender as LinkButton;
GridViewRow gvrow = lb.NamingContainer as GridViewRow;
gvsize.DeleteRow(gvrow.RowIndex);
}
GridView:
<asp:GridView ID="gvsize" runat="server" ShowFooter="True" CellPadding="1" CellSpacing="2" AutoGenerateColumns="false" GridLines="Horizontal">
<asp:TemplateField HeaderText="Action">
<ItemTemplate>
<asp:LinkButton ID="lnkdelete" runat="server" ForeColor="Blue" OnClick="lbDelete_Click">Delete</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</asp:GridView >
There are 2 rows in my gridview which I need to delete the row using the function above.
It throws an error "gvsize" RowDeletingEvent was not handled properly.
Is that necessary to use OnRowDeleted/OnRowDeleting in gridview which I feel not necessary??

As stated in How to delete row from gridview?
You are deleting the row from the gridview but you are then going and
calling databind again which is just refreshing the gridview to the
same state that the original datasource is in.
Either remove it from the datasource and then databind, or databind
and remove it from the gridview without redatabinding.
You can use row databound event to accomplish this task.
<asp:LinkButton ID="lnkBtnDel" runat="server" CommandName="DeleteRow" OnClientClick="return confirm('Are you sure you want to Delete this Record?');"">Delete</asp:LinkButton>
and in the rowdatabound event you can have
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "DeleteRow")
{
//incase you need the row index
int rowIndex = ((GridViewRow)((LinkButton)e.CommandSource).NamingContainer).RowIndex;
//followed by your code
}
}

Try this to delete row
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
dt.Rows.RemoveAt(e.RowIndex);
GridView1.DataSource = dt;
GridView1.DataBind();
}
You can also delete row from another method using Template Column
ASPX
<asp:TemplateField HeaderText="Delete">
<ItemTemplate>
<asp:ImageButton ID="imgDelete" runat="server" CommandName="deletenotice" ImageUrl="~/images/delete1.gif" alt="Delete"
OnClientClick="return confirm('Are you sure want to delete the current record ?')">
</asp:ImageButton>
</ItemTemplate>
</asp:TemplateField>
C# Code
protected void gvNoticeBoardDetails_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName.ToLower().Equals("deletenotice"))
{
GridViewRow row = (GridViewRow)(((ImageButton)e.CommandSource).NamingContainer);
NoticeBoard notice = new NoticeBoard();
HiddenField lblCust = (HiddenField)row.FindControl("hdngvMessageId");//Fetch the CourierId from the selected record
auditTrail.Action = DBAction.Delete;
Service simplyHRClient = new Service();
MessageClass messageClass = simplyHRClient.SaveNoticeBoard(notice, auditTrail);
if (messageClass.IsSuccess)
{
this.Page.AddValidationSummaryItem(messageClass.MessageText, "save");
showSummary.Style["display"] = string.Empty;
showSummary.Attributes["class"] = "success-message";
if (messageClass.RecordId != -1)
lblCust.Value = messageClass.RecordId.ToString();
}
else
{
this.Page.AddValidationSummaryItem(messageClass.MessageText, "save");
showSummary.Style["display"] = string.Empty;
showSummary.Attributes["class"] = "fail-message";
}
//Bind Again grid
GetAllNoticeBoard();
}
}
Hope it helps you

how to get row values when checkbox is checked in gridview

before I asked this I did some checking around to make sure that this doesn't turn out to be a duplicate and ways to get the row values from a row that has a checkbox in its template field...but I can't seem to get it working...So far I have tried
protected void Page_Load(object sender, EventArgs e)
{
Entities NW = new Entities();
var customers =
from c in NW.Customers
where (c.ContactName.StartsWith("Ma") || c.ContactName.StartsWith("An")
|| c.ContactName.StartsWith("T")
|| c.ContactName.StartsWith("V")
)
orderby c.ContactName ascending
select new
{
c.CustomerID,
c.ContactName,
c.CompanyName,
c.City
};
gv1.DataSource = customers.ToList();
gv1.DataBind();
}
protected void Button1_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in gv1.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
CheckBox chkRow = (row.Cells[0].FindControl("CB") as CheckBox);
if (chkRow.Checked)
{
Label1.Text = row.Cells[2].Text;
}
}
}
}
I have stepped through the button click event and when it gets to
if (chkRow.Checked)
its showing as null and skips over it..
my markup is
<asp:GridView ID="gv1" runat="server">
<HeaderStyle BackColor="SkyBlue" />
<AlternatingRowStyle BackColor="Yellow" />
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="CB" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
when I look at the source after I run, the checkboxes are all named differently than what I gave them the ID of "CB", attached is the pic of the source when its running
I am not sure what I am doing wrong with this

Your GridView should have more columns, because you are referencing Cell[2] in your code.
You might try to use row object to look for your control:
CheckBox chkRow = (row.FindControl("CB") as CheckBox);