I have a gridview with predefined columns and a selectcommand. Why do I get the columns twice? I want to keep the predefined columns and the selectcommand, but avoid getting the columns double.
<asp:GridView ID="gvMeldingen" runat="server"
AllowSorting="True" DataSourceID="MyDataSource"
onselectedindexchanged="GridView_SelectedIndexChanged"[code].....
Given a GridView control defined like this:
[code]....
The "FilePath" and "AttachmentID" fields are being set correctly in the grid, however, the CheckBox control is never set correctly; it is always unchecked.
My question:
How do I get this CheckBox field set from C# as I'm creating the new row?
P.S. I am not sure if I am creating the row correctly in the first place.
i am making relation between two datatables and m getting this error
in this ds.Tables(0).Columns("In_ID") datatype is string
ds.Tables(1).Columns("row_id") datatype is integer
how i do the type casting here to make dataset relation
ds.Relations.Add("Rel_1", ds.Tables(0).Columns("In_ID"), ds.Tables(1).Columns("row_id"), True)
I am having a little trouble with an 'IndexOutOfRangeException'. I think it is because when the code tries to get the DateModified col from the database it sometimes contains NULLS (the users haven't always updated the page since they created it).
Here is my code;
s = ("select datemodified, maintainedby, email, hitcount from updates where id = @footid")
Dim x As New SqlCommand(s, c)
x.Parameters.Add("@footid", SqlDbType.Int)
x.Parameters("@footid").Value = footid
c.Open()
Dim r As SqlDataReader = x.ExecuteReader
While r.Read
If r.HasRows Then
datemodified = (r("DateModified"))
maintainedby = (r("maintainedby"))
= (r("email"))
hitcount = (r("hitcount"))
End If
End While
c.Close()
I thought (after a bit of msdn) that adding;
If r.HasRows Then
End If
after adding I am still getting the same old IndexOutOfRangeException
(ps, I have tried datemodified as string / datetime)
I have a condition to check weekdays with a particular time corresponding
to that day that were added to a grid view using a drop down list and two text boxes.
The drop down list has weekdays and textboxes has from and to time.
I have to verify a condition to avoid duplication of same day with same time should not occur in the table twice.
(i have used time picker jquery to get time.)
how should i write the condition in sql and use that in C#
I have two columns first name and last name , that have duplicates, how can i remove the duplicates and only leave the distinct members intact?
View 6 RepliesI have a GridView that has several dynamic columns (I do not know how many at design time and it could be 0-12 columns, hence need for dynamic columns). I have the columns in the grid and data bound to them - works great. There are other standard, design-time TemplateField columns with TextBox controls in them. These are bound with values that the user can edit. The grid is posted back via a Submit button. My question is "Why does gv.Columns.Insert() cause all my TextBox data to be null on Postback, but gv.Columns.Add() works like a champ?"
protected void BuildColumns()
{
// The first column to begin to insert the columns in the GridView
int columnIndex = 5;
BoundField aoColumn = new BoundField();
aoColumn.HeaderText = "New Column 1";
gvMyGrid.Columns.Insert(columnIndex, aoColumn); // kills txtQuantity.Text on postback
gvMyGrid.Columns.Add(aoColumn); // works fine
columnIndex++;
foreach (MyEntity my in _myEntityCollection)
{
BoundField myColumn = new BoundField();
myColumn.HeaderText = String.Format("{0:d}", my.StartDate);
gvMyGrid.Columns.Insert(columnIndex, myColumn);
columnIndex++;
}
}
I then go on to assign values to these BoundFields in the _RowDataBound method and all of this works great. However, when I post back and try to reference some TextBox and they are all null. And yes, I have the BuildColumns() call wrapped in if (!IsPostBack) on Page_Load. Of course I would like to use .Insert() so that the columns can go in the proper location and not at the end of the Columns array.
I created a gridview that is made up of 4 gridviews and using a stored procedure to populate it. I create columns at runtime because the number of columns changes all the time.To make the grids editable I am adding template fields at runtime as I create the columns, this is to ensure that a user is able to edit the cells and some foot values update. Reason why I have four grids is to freeze rows and columns like in excel using javascript. The problem is that performance is very bad especially in IE, the grids take a long time to load. I am not sure if this is caused by the data load or the creation of text boxes. see some of the code below for my _aspx page:
[Code]....
in asp.net page user able to select gridview Columns, and it will hide remaining columns and that selection done by check box with column list bellow is Image link , what exactly I am looking for [URL] it look bellow after selection of column done [URL]
View 1 RepliesI've created a new ASP.NET website. I've generated an Entity Data Model from my database and have dropped a entitydatasource and gridview onto my page and wired up the gridview to pull from the entitydatasource. Now I get columns like this: id extension prefix did_flag len ten_id restriction_class_id sfc_id name_display building_id floor room phone_id department_id
In each case where the item is named something_id this reflects a foreign key relationship in the database - and I did choose to have the EDM expose foreign key relationships. I'd like to make it so the gridview pulls in the values for these foreign keys rather than just showing the ID numbers - so, for example, department_id might have a value of "101" right now but it should pull from the department table "Marketing".
GridView1.Columns.Count is always zero even SqlDataSource1.DataBind();
But Grid is ok I can do
for (int i = 0; i < GridView1.HeaderRow.Cells.Count;i++)
I rename request headers here but
GridView1.Columns[i].Visible = false;
I can't use it because of GridView1.Columns.Count is 0. So how can I hide them ?
I have a datasource, which includes many columns, idealy, I need use a gridview to show:
1) first 3 columns: template fields, these fields depends on values in some columns of datasource. I use template fields, hard coded. works fine.
2) the other columns. This is I do not know how to do it. In the data source, there are about 10-20 columns data, each time, the # of columns of the data varies. idealy, I need show each of them as a seperated column in gridview. The entire data source may have 30 columns, but some of them are used in 1), and I only want show these 10-20 columns in gridview. Some columns in data source, I may not use them at all. is there a way to do this? or have to seperate them as a detail view style UI?
I am developing an web application. One of this form has a textbox. When the user enter chars i need to fetch the records from db and display as 4 columns in AUTOCOMPLETEEXTENDER CONTROL TOOL KIT and it's column name also. When the user click any one of the row, i need to get the 2nd clicked column name and display it in textbox.
how to display 4 columns and it column name in autocompleteextender control?
I am trying to arrange the report parameters in three columns instead of two columns. I have about 13 report parameters . Is there a setting anywhere to be done.
View 6 RepliesI'm creating a table in an asp.net code behind dynamically, and I want to have a footer row that only has 2 cells. The first should span all the columns in the table-1. Is there some way other then keeping track of the # of columns in the table manually for me to set the colspan to be # of all the columns in the table-1? Preferably a HTML or CSS solution?
View 2 RepliesI've the following code which successfully makes an average for all the columns from a table. What I need to do though is ignore certain columns in this equation.
Dim totalNumber as Double = 0
Dim count as Integer = 0
For x = 0 To xyz123.Tables(0).Columns.Count - 1
Dim current as Double = 0
If Double.TryParse(xyz123.Tables(0).Rows(0)(x).ToString(), current) AndAlso current <> 0 Then
count += 1
totalNumber += current
End If
Next
Dim averageRating as Double = totalNumber / count
I apologize for the odd title. I've been trying to figure out how to do this and can't quite put it into words. Basically, I need to try to display a GridView with a whole bunch of columns (37 in one case) in two "rows" of columns. More or less.
So instead of this:
Column1 Column2 Column3 Column4 Column5 Column6
Data Data Data Data Data Data
Data Data Data Data Data Data
Data Data Data Data Data Data
I'd like something like this:
Column1 Column2 Column3
Data Data Data
Data Data Data
Data Data Data
Column4 Column5 Column6
Data Data Data
Data Data Data
Data Data Data
As in the example there can be multiple rows returned which all need to be displayed. I'm trying to stop a very large horizontal scroll bar being required. I've been searching as much as I can but haven't found anything that fits what I'm looking for.
I'm binding a gridview from a webservice with 30 columns and 10 rows, I need to print the same in a PORTRAIT, for that i decided to display columns as rows and
rows as columns like below:
EMP1 1 2 3 4
EMP2 1 2 3 4
I have a Dictionary<string, bool> where key - control's ID and value - it's visible status to set:
var dic = new Dictionary<string, bool>
{
{ "rowFoo", true},
{ "rowBar", false },
...
};
Some of controls can be null, i.e. dic.ToDictionary(k => this.FindControl(k), v => v) will not work because key can't be null. I can do next:
dic
.Where(p => this.FindControl(p.Key) != null)
.ForEach(p => this.FindControl(p.Key).Visible = p.Value); // my own extension method
but this will call FindControl() twice for each key. How to avoid double search and select only those keys for which appropriate control exists? Something like:
var c= FindControl(p.Key);
if (c!= null)
return c;
but using LINQ.
how to disable caching on few pages, so as to avoid double submission of forms
View 2 RepliesI've some webpage with listview control, and double click event on each row on it.
The problem is, that when I double click the row, event is fired, that's fine, but all of the page is selected (dark blue marked, you know...).
Is there some solution to prevent select all in the whole page, or whole aplication itself?
How do i add 2 columns together (colA and colB) to create an alias third column (colC). I would like to use a sum function in my view. I have tried looking at other sites, but they want to group the columns together. I am looking for an excel view. Adding the cells together and placing the sum in the third cell.
for example,
colA colB colC
2 3 5
4 2 6
1 6 7
I am using C#.Net as my language. I want to add some columns of same name to a grid view. How can I do it???
View 3 RepliesAnybody have any links to any good references for laying out ASP.NET controls in CSS? For the life of me positioning in CSS doesn't make sense to me. I am basically trying to lay out 4 columns of controls: Label, TextBox/DDL, Label, TextBox/DDL. I thought I could just do .col2, .col3 and .col4 CssClasses with {Position:absolute; Left:150} type language in them, but when I get to the second row of controls, they overlap the first row a bit.
View 16 Repliesi have atable that contains (id, name, commission) i need to have the sum of commission where name=a as'first' and the sum where name=b as 'second' in the same row
View 2 Replies
