Forms Data Controls :: Insertion Of Null Values Using VB
Aug 4, 2010I 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.
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Data Controls :: Check For NULL Values Sum And Display Values In GridView Cells
Apr 3, 2013i 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"
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Forms Data Controls :: Formview Insert Adds All Null Values - Update Doesn't Update Values
Apr 12, 2010I 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.
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Forms Data Controls :: Default And Null Values When Inserting?
Nov 18, 2010have 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 RepliesForms Data Controls :: How To Handle Null Values In While Loop
Apr 16, 2010i am unable to handle null values in while .even i tried to handle condition is breaking and coming null value comming inside loop.
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Forms Data Controls :: Passing Null Values To ObjectDataSource
Jan 4, 2011This 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:
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The markup contains this ObjectDataSource, which is tied to the TableAdapter with the above query:
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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:
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Forms Data Controls :: Gridview Non-visible Values Always Go To Null?
Jun 24, 2010Whenever 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 RepliesForms Data Controls :: DataBinder.Eval And Null Values?
Aug 16, 2010I 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?
Forms Data Controls :: Old Values Populated As Null From ListView?
Mar 28, 2010m 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 RepliesForms Data Controls :: Formview Data - Pulling Data From A SQL Database In Cases The Rows Contain One Or More Null Values
Feb 1, 2011Using 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,
Forms Data Controls :: Making Checkbox Check If Values Are Not Null?
Feb 28, 2011I 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.
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My query is like this:
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So in a nutshell, if there is any value in PR1 - PR7, I want to check my checkbox in the gridview.
Forms Data Controls :: Getting Null Reference On Labels That Im Setting The Values To?
Mar 23, 2010Why 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:
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Assign Values To Textbox Before Insertion
Apr 28, 2013I am using Form View to Insert Data using ObjectDataSource Visual Studio2010.
It is running fine, taking values inserting and then showing in grid view using SqlDataSource.. also editing in detailsview using SqlDataSource.
1. My Column EmployeeID is of String nature.now i dont want the user to input Employeeid, i want E-123 type value. and i want to get the max id from table and +1 before inserting new record. what are the step to do it.
2. I want to display status column as check box in detailsview. it is again string type and taking values T or F. how to do it?
3. Status Checkbox need to be displayed in Grid View also.
Forms Data Controls :: Handle Null Values Being Assigned To A Calendar Control?
Nov 13, 2010I'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?
Forms Data Controls :: Gridview RowCommand Event Returning Null Values?
Sep 2, 2010I'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.
Forms Data Controls :: How To Deal With Null Values In GridView Container.DataItem
Jan 23, 2011How to deal with Null values in GridView Container.DataItem
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Forms Data Controls :: Dropdownlist In A Formview - Insert Fails Because Of Null Values?
Jan 5, 2010I 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:
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Forms Data Controls :: When Updating Gridview When Hide Columns Values Turn To Null?
Mar 5, 2010I 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 RepliesForms Data Controls :: Store Server Time On Insertion Of Record?
Sep 15, 2010In my online web-application User is inserting new records and when user enters record system gets current datetime (using below query) and insert into table.
INSERT INTO Gponmig(Customer_Name, Contact_Mob_No, Sector, Plot, flat, Building_LandMark, Sr_No, Adsl_Acc_No, Del_Acc_No, Mig_Requirment, Reseller, Sales_Remarks, Userid, Dept, Date)
VALUES (@Customer_Name,@Contact_Mob_No,@Sector,@Plot,@flat,@Building_LandMark,@Sr_No,@Adsl_Acc_No,@Del_Acc_No,@Mig_Requirment,@Reseller,@Sales_Remarks,@Userid,@Dept,
GETDATE())
Problem:
User entered data at 12:27 PM but system recorded 12:27 AM.
I couldn't find why?
It is confirmed by the user that he didn't worked midnight.
Required:
The system should insert correct time.
DataSource Controls :: Null Values In Data Select
Feb 27, 2011I 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")
Data Controls :: Query For Both Empty Or Null Values Check Together
Mar 14, 2012this 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)
Forms Data Controls :: Values "Null" In The Datagridview - Can Avoid It
Dec 9, 2010I 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
Data Controls :: Handle NULL Values When Converting DataTable Cell Value To String In C#?
Dec 23, 2015How 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 " +
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Data Controls :: Handle Blank / Spaces And NULL Values When Exporting GridView To CSV?
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.
Forms Data Controls :: Making Visible Of Gridviwe Column If All Values In Selected In A Column Is Not Null
Dec 30, 2010I have gridviwe having 2 columns:
1) DocNumber 2)Title
query select docnumber,title from tbl_docs.
BindwithGridviwe(sql);
Now the issue is that that every document doesn't has document number. I want to make invisible the docuNumber column of the grid viwe if all values in the docNumber retrieved are null.for example:
docnumber tite
null Document 1
null Document 2
null doucment 3
null document 4
if returned result match above where all docnumber are null then make the gridviwe docnumber column ivisible eslemake the greidviwe column visible.