VS 2008 Checkbox Column In Gridview/unable To Get Correct Output, Because Database Null?
Oct 20, 2010
SOURCE CODE -
Code:
<asp:GridView runat="server" ID="Grd" AutoGenerateColumns ="false" >
<Columns >[code]....
You can see in Pic Attached, Records of table TBL_STUDENT, and also find the output what I am getting . For the records - 2 and 3 whose Name is B and C, I m getting the correct status,But for the Record whose Name is A, I am not getting correct Output, Because in Database null is dere, I want if in database null is dere then checkbox is Unchecked. How to to dat???
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Nov 24, 2010
I'm trying to bind a nullable bit column, which at the moment is mostly null, but I need to somehow convert the null to a 'false' on runtime because it doesn't bind to a checkbox if it's null. But, I am currently unable to change the default value and update all records accordingly - is there a way to do this in runtime?
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Mar 6, 2011
I'm currently working on a small project and therefore created a gridview, including one bit column which has been linked with a checkbox in both the itemtemplate as the edititemtemplate (autopostback = true).Databinding for these two checkboxes has been linked (two-way) to the bit column.Now I want to display the gridview to end-users. They should be able to just click on the checkbox so they value in the database column gets changed as well (as I want to run update queries behind it), but not passing via the command column 'EDIT'.=> problem I'm having now is that the bit column in the database doesn't get updated.
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Jun 29, 2010
I am dynamically binding a typed list to a GridView control.
The Grid View Control is in an asp.net page that is wrapped in an asp:UpdatePanel (Ajax).
The first column contains a checkbox control.
Only one checkbox may be checked in this column.
If the user checks a checkbox, all other checkbox must be unchecked.
I am trying to achieve this using client-side script without success.
In the handler for the GridView's RowDatabound event, have attempted to add an attribute to the CheckBox contained within the cell.
[code]....
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Aug 2, 2010
i want parse null value and disable checkbox in form view how can i do that that's my current code:
<asp:CheckBox ID="FLPCheckBox" runat="server" Text="Full Load Passed" Checked=' <%# (Eval("FullLoadPassed")==DBNull.Value ? false : Eval("FullLoadPassed"))%>' />
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Aug 5, 2010
GridView
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AllowSorting="True" PagerSettings-Position="TopAndBottom"
PagerSettings-Mode="Numeric" PageSize="40" CellPadding="4" DataSourceID="dsEquipmentGridView"
ForeColor="#333333" GridLines="Horizontal" Style="font-size: x-small" AutoGenerateColumns="False"
[Code]....
For the first page loaded, it shows the correct DataKey value if I click on the command field.
However if I change to the next page of results, upon selecting a record the corresponding value is incorrect. It seems to keep the previous page information. How do I overcome this?
EDIT:
In the GridView1_SelectedIndexChanged method, I used the following:
[Code].....
I am unable to get the correct value after paging.
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Apr 6, 2010
I have a gridview which displays following columns:
TaskID, TaskDescription, IsComplete, DateOfCompletion
Now what I want to achieve is, when user clicks IsComplete checkbox, she must enter the date of completion. So, I want a validation (client side) on DateOfCompletion if the checkbox is selected (checked). And, I also want to use Validator Callout Extender
if possible.
How can I achieve this?
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Dec 6, 2010
I have setup my business object to have a create_date and edit_date members both datetime datatypes. My company want to display the create_date and edit_date fields in a gridview for each transaction. The problem i have is that after insterting a record it will have a valid create_date but no edit_date and when displayed in the gridview it defaults to datetime.minvalue (My default). How on earth do i show an empty field in my gridview for a null datetime field in the database?
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Jan 28, 2011
I am using NLog for logging in an ASP.Net application and making use of the database target with Microsoft Sql Server.I have some logging parameters that are optional and not always specified. I would like these to be written as null when they are not provided, however NLog seems to always write them as empty strings.
Is there a way to configure it to write null as the default?
Ref: http://nlog-project.org/wiki/Database_target
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Mar 9, 2011
I have a date that is entered into the database in dd/MM/yyyy format via a form.
It is then outputted on another page in a sort of calendar style, ie MMM and dd.
When this form is filled in in the UK, and the date is for example the 3rd April, everything is ok. However if filled out in the US, when outputted the date shows as 4th March.
So my question is how do I ensure, when outputting the date, it's read as dd/MM/yyyy and not MM/dd/yyyy ?
Is it a problem that should be addressed when the data is added, or when it is printed?
For reference:
When the date is added:
value="@DateTime.Now.ToString("dd/MM/yyyy")"
And when it is printed:
<h2>
<span class="month">@row.EntryDate.ToString("MMM")</span>
<span class="day">@row.EntryDate.ToString("dd")</span>
</h2>
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Sep 23, 2010
I am not able to Disable CheckBox in GridView , whats the problem with my code ?
foreach (GridViewRow row in GridView1.Rows)
{
CheckBox ch = (CheckBox)row.FindControl("CheckBox1");
if (ch.Checked)
{
String ExamineeId = (String)GridView1.DataKeys[row.RowIndex].Value;..........
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Jun 16, 2015
How should i insert null values into a database. I have textbox1 and the textbox2 will convert the value out of textbox1, when i the time i click save and the textbox1 is empty i got an error, "Conversion from string "" to type 'Date' is not valid." i just want to insert null value if the textbox is empty.
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Aug 4, 2010
i use this to select one checkbox to isselected column how i convert this to multi checkboxlist to single column i use many ways more than 3 days without success
private void BindCheckBoxList()
{
DataTable dt = new DataTable();
SqlConnection connection = new SqlConnection(GetConnectionString());
try
{
connection.Open();
string sqlStatement = "SELECT * FROM boby";
SqlCommand sqlCmd = new SqlCommand(sqlStatement, connection);
SqlDataAdapter sqlDa = new SqlDataAdapter(sqlCmd);
sqlDa.Fill(dt);
if (dt.Rows.Count > 0)
{
CheckBoxList1.RepeatColumns = 4; // set the number of columns in the CheckBoxList
CheckBoxList1.DataSource = dt;
CheckBoxList1.DataTextField = "Name"; // the items to be displayed in the list items
CheckBoxList1.DataValueField = "Name"; // the id of the items displayed
CheckBoxList1.DataBind();
//Setting the Selected Items in the ChecBoxList based from the value in the database
//to do this, lets iterate to each items in the list
for (int i = 0; i < dt.Rows.Count; i++)
{
if (!string.IsNullOrEmpty(dt.Rows[i]["IsSelected"].ToString()))
{
CheckBoxList1.Items[i].Selected = Convert.ToBoolean(dt.Rows[i]["IsSelected"]);
}
}
}
}
catch (System.Data.SqlClient.SqlException ex)
{
string msg = "Fetch Error:";
msg += ex.Message;
throw new Exception(msg);
}
finally
{
connection.Close();
}
}
private void Update(string name, bool isSelected)
{
SqlConnection connection = new SqlConnection(GetConnectionString());
SqlCommand cmd;
string sqlStatement = string.Empty;
try
{
connection.Open();
sqlStatement = "UPDATE handymen SET IsSelected = @IsSelected WHERE Name = @BizName";
cmd = new SqlCommand(sqlStatement, connection);
cmd.Parameters.AddWithValue("@Name", name);
cmd.Parameters.AddWithValue("@IsSelected", isSelected);
cmd.CommandType = CommandType.Text;
cmd.ExecuteNonQuery();
}
catch (System.Data.SqlClient.SqlException ex)
{
string msg = "Insert/Update error";
msg += ex.Message;
throw new Exception(msg);
}
finally
{
connection.Close();
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
BindCheckBoxList();
}
}
protected void Button1_Click(object sender, EventArgs e)
{
string str = string.Empty;
for (int i = 0; i < CheckBoxList1.Items.Count; i++)
{
if (CheckBoxList1.Items[i].Selected)
{
str = CheckBoxList1.Items[i].Text;
Update(str, CheckBoxList1.Items[i].Selected);
}
}
//ReBind the List to retain the selected items on postbacks
BindCheckBoxList();
}
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Apr 21, 2010
I'm unable find check box control in my webpage.
When building the page I'm getting "checkbox null" and "false".
I'm pasting the code here.
[Code]....
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Jun 19, 2010
how to add checkbox column to gridview
foreach (GridViewRow objRow in GridView1.Rows)
{
TableCell tcCheckCell = new TableCell();
CheckBox chkCheckBox = new CheckBox();
tcCheckCell.Controls.Add(chkCheckBox);
objRow.Cells.Add( tcCheckCell);
}
how to add the objrow to gridview again
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May 7, 2010
i am creating a total column which multiplies the price by quantity in my gridview but am stuck on converting the input strings.
The price is stored as a decimal in my database and the quantity is a nvarchar.
i am receiving this error:
Input string was not in a correct format.
Description:
An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.FormatException: Input string was not in a correct format.
Source Error:
[Code]....
heres my row databound event:
[Code]....
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Jan 21, 2011
I have a template field within a GridView to display a checkbox in edit view and some custom text in normal view.
The results of the query to populate the grid are coming back in a DataSet.
In the edit view I can't get the checkbox to accept the column that is retuning from the DataSet (which is in T/F format) as it says its not the correct type. Even if I return "true" or 1 in the column it still dosn't work.
I take it I need to convert but can't get the syntax correct in this context
<EditItemTemplate>
<asp:CheckBox ID="cbPostToFarm" runat="server" Checked='<% Bind("BOOL_COL")' />
</EditItemTemplate>
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Feb 18, 2010
I wnat to access the checkbox value of gridview in JS, using for loop,
function sonia()
{
alert('a');
var gvET='<%=GridView1.ClientID%>';
var grid = document.getElementById(gvET);
var rowIdx=1;
alert (grid.rows.length);
for (rowIdx; rowIdx<=grid.rows.length-1; rowIdx++)
{
var rowElement = grid.rows[rowIdx];
var chkBox = rowElement.cells[0].firstChild;
alert(chkBox.checked);
var chkBox = rowElement.cells[1].firstChild;
alert(chkBox.text);
}
return false ;
}
I set the autogenerate columns porperty of Gridview to true. In first cell i have checkboxes. My code is not giving me any error. First cell value that is checkboxs comes correctlt,but text of second cell is not coming in second alert.Y so? In second alert,everytime undefined is coming
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Sep 24, 2010
I wnat to have checkbox in Gridview Header. On the checkbox changed I wnat to check and uncheck all the checkboxes of the Gridview Rows. Currently I am doing it on the button click. But I want to have checkbox in Gridview header, How to have checkbox in Gridview Header,can somebody tell me??
protected void btnCheckAll_Click(object sender, EventArgs e)
{
Check_Uncheck_Checkboxes(true);
}
protected void btnunCheckAll_Click(object sender, EventArgs e)
{
Check_Uncheck_Checkboxes(false);
}
private void Check_Uncheck_Checkboxes(bool bState)
{
CheckBox chk;
foreach (GridViewRow rowItem in GrdCompanies.Rows)
{
chk = (CheckBox)(rowItem.Cells[1].FindControl("chkSelect"));
chk.Checked = bState;
}
}
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Feb 14, 2010
Using Visual Web Developer 2008 Express with what I'm assuming is Sql 2008 Express. Using SqlDataSource, when I try to configure a data source, I'm able to input a server name: (local)sqlexpress and the "Test Connection" button shows that it was successful. However, if I type in a new database table name and VWD 2008 asks if I would like to create it, I keep getting the message: "OBJECT REFERENCE NOT SET TO AN INSTANCE OF AN OBJECT." No idea what that means or how to fix it. I can't open theDatabase Explorer View.
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Jun 11, 2010
I am using Visual Studio 2008 Professional Version.i am trying to open a database of a starter kit which was created also created in VS 2008.everytime i try to open the database i get this message window: i don't know why i am getting this message i am using VS 2008 Profession Full Version
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Feb 17, 2010
I can't seem to check the checked value of a dynamic checkbox within a gridview. I've tried dozens of ways to test the checkbox's checked value, but it still returns false, when it should return true. If I change the checked value to true in the ASPX web page, then it will return true, even when it should return false. Any ideas? I've tried many different ways of checking the checkbox value including the one below.
MailingLabels.aspx
Code:
<asp:GridView ID="GridView" runat="server" AutoGenerateColumns="False" DataKeyNames="NewClientID">
<Columns>
<asp:BoundField DataField="NewClientID" InsertVisible="false" />
[code]....
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Aug 17, 2010
I have a unbound checkbox column in the GridView control.
When i try to get the value of checkbox in the C# code the checkstate is always false.
I want to check if the Checkbox is selected in a row and get the values of all the cells in that row.
CheckBox chkSelect= (CheckBox)GridView1.Rows[1].FindControl("chkSelect");
<asp:GridView
runat="server"
ID="GridView1"
AutoGenerateColumns="False"
[Code].....
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Mar 3, 2011
On click of checkbox, I need to retrieve immediate parent span's class value:
The checkbox column is defined in an ItemTemplate as:
<asp:CheckBox CssClass='<%# Eval("ID") %>' Checked='<%# Eval("IsSelected") %>'
Text="" runat="server" onclick="CartItemCheckClicked()" />
The JS function is defined as:
function CartItemCheckClicked() {
alert($(this).parent().attr('class')); //Undefined
//alert($(this).attr('id')); //Undefined [code]....
But the result is always 'undefined'. How do I access the checkbox or parent span?
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Jul 22, 2011
I edited my gridview template by adding an additional column of checkbox and to its header
I managed to do a checkchange for select all or none and for selecting single of multiple checkbox.
My problem here is that when I try to select all, uncheck another checkbox, the header checkbox is still checked and the unchecked checkbox becomes checked again.
If i did not check my header checkbox and just check it normally, its fine.
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