How do I do a grdiview on select row event? On the source page, I added
OnSelectedIndexChanged="grdTanks_OnSelectRow"
in the code behind, I put the function
protected void grdTanks_OnSelectRow(Object sender, GridViewCommandEventArgs e)
{
}
When I try to do it that way, I get No overload for grdTanks_OnSelectRow matches delegate 'System.EventHandler'
If I change the GridViewComandEventArgs to EventArgs, then it won't allow me to do
if (e.CommandName == "Select")
anybody know how to do a OnSelectRow event for a gridview? Thanks
I also added this code:
protected void grdTanks_RowDataBound(Object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
if (e.Row.RowIndex != -1)
{
e.Row.Attributes["onmouseover"] = "this.style.cursor='hand';this.style.background='#3260a0';;this.style.color='white'";
if (e.Row.RowIndex % 2 == 1)
{
e.Row.Attributes["onmouseout"] = "this.style.textDecoration='none';this.style.background='white';this.style.color='black'";
}
else
{
e.Row.Attributes["onmouseout"] = "this.style.textDecoration='none';this.style.background='#bEc8bE';this.style.color='black'";
}
e.Row.Attributes["onclick"] = ClientScript.GetPostBackClientHyperlink(this.grdTanks, "Select$" + Convert.ToString(DataBinder.Eval(e.Row.DataItem, "CargoTankID")));
}
}
}
You could try this:
In the page_load, enter
grdTanks.SelectedIndexChanged +=
and press tab twice. Visual Studio automatically generates the handler for you. The second param would be EventArgs
I think you have to change
protected void grdTanks_OnSelectRow(Object sender, GridViewCommandEventArgs e)
To
protected void grdTanks_SelectedIndexChanged(Object sender, GridViewCommandEventArgs e)
In your code behind
I am not sure what you want to do in this event handler. You are already handling for select event and I think, no need to check again for (e.CommandName == "Select"). (MSDN:The SelectedIndexChanged event is raised when a row's Select button is clicked).
The error said no overload for event and you have to use EventArgs argument.
protected void grdTanks_OnSelectRow(Object sender, EventArgs e)
{
// May be you want like..
// Get the currently selected row using the SelectedRow property.
GridViewRow row = YourGridViewID.SelectedRow;
}
Related
I need a hand.
How to change background color of a entire Row on dataBound Event Programatically in a gridview ?
protected void databound_gridview(object sender, GridViewRowEventArgs e)
{
}
On top of my head you'll need to create a RowDataBound Event and then you can do something like
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowIndex == 1)
{
e.Row.BackColor = Color.Red;
}
}
I am using DataList and want to bind data through databinding event.
When i tried to bind data using ItemdatBound event than its give error and when i am using breakpoint than it was first go to the datBinding event and than source code and when its goes to the source code, its give error that "System.Data.DataRowView' does not contain a property with the name 'iParentPageId_PK"
So What I do Now???
Its My Code...
protected void dlRight_ItemDataBound(object sender, DataListItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item)
{
Label lblId = (Label)e.Item.FindControl("lblId");
SubPage objEntity = new SubPage()
{
ParentPageId = Convert.ToInt32(lblId.Text)
};
dlRight.DataSource = objSubBll.GetByParentPageId(objEntity);
dlRight.DataBind();
}
}
protected void dlRight_DataBinding(object sender, EventArgs e)
{
}
I'm trying to set an initial selection for a DropDownList by calling: drop.SelectedIndex = 5 in Page_Load.
This works, but then if I change the selection manually and want to save the form, I'm still getting the initial selection instead of the new selection when calling drop.SelectedValue. What's wrong?
You have forgotten you check if(!IsPostback). Otherwise you will select the 6th item again on postbacks before the SelectedIndexChanged event is triggered (or a button-click event):
protected void Page_Load(Object sender, EventArgs e)
{
if(!IsPostBack) // do this only on the initial load and not on postbacks
dropDwonList1.SelectedIndex = 5;
}
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
//set up data here
}
}
if (Page.IsPostBack)
{
//do page reload logic in here
}
protected void foo(object sender, EventArgs e)
{
//get your selected value here
}
Try this code
You should be using if(!IsPostback) in the Page_Load function.
protected void Page_Load(Object sender, EventArgs e)
{
if(!IsPostBack)
{
drop.SelectedIndex = 5;
//yourcode
}
}
Through this your problem will be solved
I want to update my label content when the user submits a form but it doesn't get updated. Although I have put it in if (!IsPostBack) condition in form load It doesn't show the changes. The only solution that I came up with was defining a counter and increase it in button_click event and check it before label update in !IsPostBack condition. Which is working fine with that.
Is there any other way to update the label text?
Here is my solution:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
if (count > 0)
lblSuccessMsg.Text ="A Message!";
count = 0;
}
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
Save();
count = count + 1;
}
please update your label code outside of !IsPostBack evnt and inside a pageload.
Hard to tell but by the sounds of it you have a submit button and the onclick needs to update this label, something like this should work. I'm using viewstate but session would work here, as would a redirect to the same page with a querystring parameter. Not sure if I've understood your question correctly though.
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
if(Viewstate["updateLabel"] == "true")
{
lblYourLabel.Text = "I'm updated now!";
Viewstate["updateLabel"] = "";
}
}
}
protected void btnYourButton_Click(Object sender, Eventargs e)
{
ViewState["updateLabel"] = "true";
//Do other stuff here if you want
}
How do I get the row index of the last row inserted in a GridView considering the user may have custom ordering in the grid (I can't use the last row).
protected void ButtonAdd_Click(object sender, EventArgs e)
{
SqlDataSourceCompleteWidget.Insert();
GridViewCompleteWidget.DataBind();
GridViewCompleteWidget.EditIndex = ??????;
}
I want to put the row into edit mode immediately after the insert occurs.
UPDATE
protected void ButtonAdd_Click(object sender, EventArgs e)
{
//SqlDataSourceCompleteWidget.InsertParameters.Add("EFFECTIVE_DATE", Calendar1.SelectedDate.ToString("yyyy-MM-dd"));
SqlDataSourceCompleteWidget.InsertParameters[0].DefaultValue = Calendar1.SelectedDate.ToString("yyyy-MM-dd");
SqlDataSourceCompleteWidget.Insert();
GridViewCompleteWidget.DataBind();
GridViewCompleteWidget.EditIndex = 1;
}
private int mostRecentRowIndex = -1;
protected void GridViewCompleteWidget_RowCreated(object sender, GridViewRowEventArgs e)
{
mostRecentRowIndex = e.Row.RowIndex;
//GridViewCompleteWidget.EditIndex = e.Row.RowIndex;
}
You would want to handle the RowCreated event. You can access the row data and identity/location using the GridViewRowEventArgs object that is passed to this event handler.
void YourGridView_RowCreated(Object sender, GridViewRowEventArgs e)
{
YourGridView.EditIndex = e.Row.RowIndex;
}
Edit using the gridview's onitemcommand. Then you can use a binding expression on the grid column to set whatever you want. If you are using a button or linkbutton or several others you could use the CommandArgument
CommandArgument='<%# Eval("DataPropertyIWant") %>'
Edit
Sorry I skipped that ordering was done by user. I've tested the following code and it works having respected the users ordering of items, but we must take the user to the page where the last row exists.
1st: Retrieve the Max(ID) from database after insertion, store it in a session
select Max(ID) from tbl_name; -- this statement can retrieve the last ID
Session["lastID"]=lastID;
2nd:
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if(e.Row.RowType==DataControlRowType.DataRow)
if (Session["lastID"] != null)
if ((int)DataBinder.Eval(e.Row.DataItem, "ID") == (int)Session["lastID"])
{
//Session["rowIndex"] = e.Row.RowIndex;
int rowIndex=e.Row.RowIndex;
if (Session["type"] != null)
if (Session["type"].ToString() == "Normal")
{
int integ;
decimal fract;
integ = rowIndex / GridView1.PageSize;
fract = ((rowIndex / GridView1.PageSize) - integ;
if (fract > 0)
GridView1.PageIndex = integ;
else if (integ > 0) GridView1.PageIndex = integ - 1;
GridView1.EditIndex = rowIndex;
}
}
}
3rd: Convert your commandField into TemplateFields and Set their CommandArgument="Command"
I'll use this argument to identify what triggered RowDataBound event. I store the value in a Session["type"]. The default value is "Normal" defined in the page load event.
if(!IsPostBack)
Session["type"]="Normal";
the other value is set in RowCommand event
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandArgument == "Command")
Session["type"] = "Command";
}
It works for me fine.
Sorry for my language and,may be, unnecessary details.
UPDATE: I worked off of this post
I'm assuming you just return a value after doing the insert but you can set ID wherever you insert the record.
private int mostRecentRowIndex = -1; //edit index
private bool GridRebound = false; //used to make sure we don't rebind
private string ID; //Is set to the last inserted ID
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack)
{
//Set so grid isn't rebound on postback
GridRebound = true;
}
}
protected void ButtonAdd_Click(object sender, EventArgs e)
{
SqlDataSourceCompleteWidget.InsertParameters[0].DefaultValue = Calendar1.SelectedDate.ToString("yyyy-MM-dd");
ID = SqlDataSourceCompleteWidget.Insert();
GridViewCompleteWidget.DataBind();
}
protected void GridViewCompleteWidget_RowDataBound(object sender, GridViewRowEventArgs e)
{
//Check that the row index >= 0 so it is a valid row with a datakey and compare
//the datakey to ID value
if (e.Row.RowIndex >= 0 && GridViewCompleteWidget.DataKeys[e.Row.RowIndex].Value.ToString() == ID)
{
//Set the edit index
mostRecentRowIndex = e.Row.RowIndex;
}
}
protected void GridViewCompleteWidget_DataBound(object sender, EventArgs e)
{
//Set Gridview edit index if isn't -1 and page is not a post back
if (!GridRebound && mostRecentRowIndex >= 0)
{
//Setting GridRebound ensures this only happens once
GridRebound = true;
GridViewCompleteWidget.EditIndex = mostRecentRowIndex;
GridViewCompleteWidget.DataBind();
}
}
Selects if inserting last record in gridview (no sorting)
You should be able to get the number of rows from the datasource: (minus 1 because the rows start at 0 and the count starts at 1)
GridViewCompleteWidget.EditIndex = ((DataTable)GridViewCompleteWidget.DataSource).Rows.Count - 1;
But put this before you bind the data:
protected void ButtonAdd_Click(object sender, EventArgs e)
{
SqlDataSourceCompleteWidget.Insert();
GridViewCompleteWidget.EditIndex = ((DataTable)GridViewCompleteWidget.DataSource).Rows.Count - 1;
GridViewCompleteWidget.DataBind();
}