Forms Data Controls :: Values "Null" In The Datagridview - Can Avoid It
Dec 9, 2010
I have a datagridview inserted into the form, and sometimes I need that some fields stay in "blank", but with "Null", I tried to use that in the edition columns part
<asp:BoundField DataField="Line" SortExpression="Line" HeaderText="Line"
NullDisplayText=" " />
But when I click on the button "upload", it insert on the field the value of "Null" despite the code, and I have to correct that directly in the server, opening the table and adding a space into the field and then the null value is in "blank"
Actually I was attemping with this second option
<asp:BoundField DataField="Linea" SortExpression="Linea" HeaderText="Linea"
NullDisplayText="N/a" />
And when I click on the upload button, it is continuing saving "Null" and not "N/a", of course I would like the first option
View 2 Replies
Similar Messages:
Feb 17, 2011
I am new to asp.net and was trying to use datagridview in my webform. I was able to bind it to my database but I cannot make the datagridview's buttonfield respond. It seems the grid's SelectedIndexChanged event is not being fired or has issues with postback. Even a very simple statement is not being executed by the program e.g.
protected void grid_SelectedIndexChanged(object sender, EventArgs e)
{
detailsLabel.Text = "asdfasdfsafasddf";
}
It seems the SelectedIndexChanged is not being fired. I have checked my IE and scripting is enabled.
I am using VS 2008 and IE7. Can anyone share a solution on how to solve this issue?
View 7 Replies
Apr 3, 2013
i am using a gridview in my web page,i used to bind the database records to the gridview..my columns are name,empid,company name,pl leave,sl leave,total leave taken here total leave taken is not a database fields,in the page i want to fill the records once loaded pl leave and sl leave is added and display in the total leave taken column..it working properly when all pl ans sl columns fill with numbers,if some pl and sl leave having blank values.it showing an error like input sting was not in correct format..this is my code
<Columns>
<asp:BoundField DataField="slno" HeaderText="SerialNo"
SortExpression="slno" />
<asp:BoundField DataField="ecode" HeaderText="Employee Code"
SortExpression="empcode" />
<asp:BoundField DataField="ename" HeaderText="Employee Name"
[code]....
View 1 Replies
Jan 24, 2016
I have 3 textboxes and one submit button outside gridview. This textboxes submit value to gridview.
I want to be able to check and stop duplicate value in gridview.
View 1 Replies
Apr 12, 2010
I have a typical gridview/formview master control setup. When I try to update or insert I don't get any errors but it also doesn't work. When I try to insert data all I get are null values and when I update, none of the values are updated. The formview looks like its working, but just doesn't. The primary key is an identity and it auto-increments by one.
[Code]....
View 3 Replies
Aug 4, 2010
I am having real trouble at the moment trying to input NULL values into a field. what I want is, using VB, the ability to insert into parameters NULL values.
View 3 Replies
Nov 18, 2010
have a form where I insert record via DetailView control. I have some string fields. For each string field (nvarchar in sql) I have defined the Default Value in the SQL SERVER (2008) as ''. Also I have added to each InsertParameter of the DetailsView a DefaultValue="".Yet still, if the user enters no value for one of the string fields, NULL is inserted into the table.
View 4 Replies
Apr 16, 2010
i am unable to handle null values in while .even i tried to handle condition is breaking and coming null value comming inside loop.
[code]....
View 3 Replies
Jan 4, 2011
This is an ASP.NET 3.5 web app written in C# using VS2008 and connecting to an MS SQL backend. It is using ad hoc queries in a strongly typed dataset to pull from the database. This query (shortened for clarity) is designed to allow optional input of parameters (a requirement) or pull all records if no parameters are input. It works normally in SQL Server Management Studio with the addition of Declare and Set statements and it works normally in the TableAdapter's Query Builder:
[Code]....
The markup contains this ObjectDataSource, which is tied to the TableAdapter with the above query:
[Code]....
The problem I'm having is in passing null values to the ODS to feed to the query. Tying the ODS parameters directly to the dropdownlists and textboxes didn't work. Got an error message that there was a mismatched data type. Tried several combinations of code to feed the right values to the ODS parameters but couldn't find one that worked. Is the problem in the query or am I setting up the code-behind wrong? Here's the code:
[Code]....
View 9 Replies
Jun 24, 2010
Whenever you turn off the visibility of a column in Gridview, on Edit, the value becomes null because its never bound. The only way I know of stopping this behavoir is to put it in the DataKeyName list. Is there any other way to prevent this? I have quite a few columns that will not be displayed in this "release" but I want there for future extensibility. Also, in some cases these values will be used for calculations but the user should not see them. Is there no toggle property for "non-visible" items to remain "unchanged" or something of the sort?
View 3 Replies
Aug 16, 2010
I have a hiddenfield in my datalist .....and its databinded like this
<asp:HiddenField ID="SecondLevelCategory" runat="server" Value='<%# DataBinder.Eval(Container.DataItem, "SecondLevelID") %>' />
the problem arise when this datacolumn in my database have a null value, it throws an error ....how can I get this to work so that DataBinder.Eval can take a null value?
View 3 Replies
Mar 28, 2010
m using a listview and an object data source in my application, with optimistic concurrency control.i have only 2 columns in the listview: category_ID and category_name;when i try to delete an item, an error message is generated saying that one of the old values populated by the list view is null, i performed debugging, and found that the category_ID old value is populated correctly, while the category_name old value is populated as nulli can't find a problem in the code, i executed the delete command in the query builder directly and it worked fine,
View 2 Replies
Feb 1, 2011
Using a class component, an Object data source and a formview I am successfully pulliing data from a SQL database. In some cases the rows contain one or more Null values and I would like them to be ignored completely. My simple code follows:-
<%# Eval("add_1") & ","%>
<%# Eval("Add_2") & ","%>
<%# Eval("Add_3") & ","%>
OUTPUT:-
Rose Cottage, 123 New Road, Margate,
View 2 Replies
Feb 28, 2011
I have a Sql Data Source that queries my class database. What I'm trying to do to save myself some landscape is to check a checkbox if any of the pre-requisite fields are not empty. I have this laying inside a gridview. My code doesn't error out but it doesnt' do anything either.
[Code]....
My query is like this:
[Code]....
So in a nutshell, if there is any value in PR1 - PR7, I want to check my checkbox in the gridview.
View 9 Replies
Mar 23, 2010
Why would i be getting NullReferenceException if im setting the labels with values?In my page_load i have the following:
Label hireMess = (Label)FormView1.FindControl("hireMess");
Label hireEnd = (Label)FormView1.FindControl("hireEnd");
HyperLink hyptry = (HyperLink)FormView1.FindControl("hyptry");
and right below that i have 1 condition to check for and then set the Text value of the 2 labels.hireMess.Text = "It Was Successfully!";hireEnd.Text ="You will be re-directed to your Pool in 10 seconds.";I compared the page to production and eveyrthing is the same and production doesnt have any issues.. not sure why its coming up null.The error comes up for the first label:Object reference not set to an instance of an object. Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error:
[Code]....
View 5 Replies
Nov 13, 2010
I've got a detailsview control on a page. The table that it interacts with has a DateTime column in it. This column is nullable, and a lot of the records have null for that value. In the EditItemTemplate I've got a calendar control. When I try to put the DetailsView into edit mode, I get the following error message:
System.InvalidCastException was unhandled by user code
Message=Specified cast is not valid.
Source=App_Web_srpmlyjd
StackTrace:
at ASP.entries_aspx.__DataBinding__control44(Object sender, EventArgs e) in c:inetpubwwwrootMediaLibraryEntries.aspx:line 103
at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding)
at System.Web.UI.Control.DataBindChildren()
I am convinced that the problem is the null values in the DateTime column of the table. I've done some web searches on this, and some have suggested placing some dummy values into that column, but that seems more like a kludge, rather than a solution. How do I keep nulls in the table, and yet not have that preceeding error come up when a user tries to edit the selected record?
View 1 Replies
Sep 2, 2010
I'm trying to retreive values entered by users in the textboxes in the footer of the gridview and insert these values into another sql table.My code is as follows :-
protected void GridView2_RowCommand(object sender, GridViewCommandEventArgs e)
{
if(e.CommandName.Equals("addnew"))
{
TextBox t1 = (TextBox)GridView2.FooterRow.FindControl("tfrm");
string frm = t1.Text;
TextBox t2 = (TextBox)GridView2.FooterRow.FindControl("tsub");
string sub = t2.Text;
string cmd = "insert into suggestions values('" + frm + "','" + sub + "','c','c')";
con.Open();
SqlCommand com = new SqlCommand(cmd,con);
int a = com.ExecuteNonQuery();
GridView2.DataBind();
con.Close();
}
}
But the strings 'frm' and 'sub' returns null values.
View 8 Replies
Jan 23, 2011
How to deal with Null values in GridView Container.DataItem
[Code]....
View 1 Replies
Jan 5, 2010
I have a formview on a web page, set to insert mode as default. The form view is bound to a SQLDatasource. This datasource has a custom query written to select the details for this formview. The query joins two tables to provide relevant detail and not just an ID for one of the elements on the form view.
The first tabe contains information regarding projects and the second table contains detail regarding Resources. First table has the following definition:
[Code]....
View 10 Replies
Mar 5, 2010
I am updating a gridview. Problem is that when I hide certain fields that I do not want the user to update, they lose their values ie. the data is wiped out in the field unless I show them on the grid and make them writeable. Is there a property I need to set for the field to retain the value when the grid is updated or is this in the sql statement?
View 7 Replies
Feb 27, 2011
I am trying to pad for null values in the below code. Anybody know how to fix this error? Conversion from type 'DBNull' to type 'String' is not valid.
Dim dvUserImgPath As Data.DataView = CType(ImgPathDS.Select(DataSourceSelectArguments.Empty), Data.DataView)
Dim drUserImgPath As Data.DataRowView = dvUserImgPath.Item(0)
lblHiddenImgPath.Text = drUserImgPath.Item("ImgPath")
View 5 Replies
Nov 18, 2010
I have a user control with GridView. GridView template has label that suppose to get custom object value Name.
aspx:
<asp:Label ID="lblImage" runat="server" Text='<%# MyData.Name%>' />
cs:
public MyObject MyData;
During page loading MyData object is null, so I'm getting exception: "Object reference not set to an instance of an object.".
How to avoid the error?
View 5 Replies
Mar 14, 2012
this is my sql query and its work fine in my code but it only check ParentDeptID IS NULL it not working when ParentDeptID field is empty how can i check it
("select DeptID,DeptName,(select count(*) FROM HrDept " _
& "WHERE ParentDeptID=sc.DeptID) childnodecount FROM HrDept sc where ParentDeptID IS NULL ", _
objConn)
View 1 Replies
Dec 23, 2015
How to allow null value on my program?
for below statement, "WARNING_TYPE" IS NULL..
but when I run, it promp me error..what are the correct statement should i write. tq all
l_Connection.ConnectionString = constr
l_Command.Connection = l_Connection
l_Command.CommandType = CommandType.Text
l_Command.CommandText = " SELECT UNP.EMPLOYEE_ID, UNP.UNPAID_DAYS, ABST.ABSENT_DAYS, WARN.WARNING_TYPE " +
[code].....
View 1 Replies
Nov 22, 2015
[URL]
how do you handle null data on gridview? and also the white spaces, it seems that the white spaces are converting to " "
Note: i can't replace the because i have 1 column thats in html form.
View 1 Replies