I have a Gridview which is populated from an ObjectDataSource. Data Source has a control parameter hooked up to the SelectedDataKey value of the GridView. My Gridview has rows which may not have a DataKey. I am receiving an error when a GridView row without a DataKey is selected.
View 5 RepliesI have a gridview with datakey value
in save button click i want to get the gridview datakey value
Dim _id As Integer For Each row As GridViewRow In Me.gridviewi.Rows Next
Tried this but it doesn't work.
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Retrieving datakey value in gridview?
Lets say for example that I have a book object that looks like this:
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And a Page_Load method that bounds a GridView called "gvBooks" from a generic list of books:
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Now as you can see, I want to have the BookId value that is part of the Dictionary as a DataKey of the gvBooks GridView.
That piece of code of curse returns an Exception:
"DataBinding: 'GridViewTest.Book' does not contain a property with the name 'BookId'."
My question is: Is it possible to have the BookId value as a DataKey of the GridView?
I'm relatively new to the VS environment. I'm using VS2010 Beta 2 with VB. I have a Gridview setup to pull a list of employees. Next to their name I have edit and delete icons. When I leave the icons as ButtonFields, they pass the DataKey value to my code behind perfectly. When I convert the ButtonFields to TemplateFields, they no longer pass the DataKey.
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My gridivew currently has 4 colums with the third being a subject column. I want this colum to have bold text if the datakey 'ReadStatus' is equal to false. I have had success if the column is bound to the gridview but 'ReadStatus' is only a datakey and not bound to the gridiview. My code is below:
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I want to select a row in my GridView based on a known data key value at runtime.
In other words, I have a data key value, 2 for ex., and the primary key value of one of the rows in my GridView is 2. How can select that row? (Without having to go through each row to find which one matches my key, then setting the SelectedIndex.
I have a GridView with a checkbox for the user to select different categories. I am trying to retrieve the CategoryID associated with each row when the user clicks next, however I keep getting an error that tells me the selected index cannot be negative or out of range.
Here is my function
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How do I retrieve the CategoryID of the row as an Integer value?
I have wired an event to handle delete command for my GridView. But I cannot determine which the record's unique key, in my case stored in DOCIDNO field. All I get is a row index, such as 0, 1, 2 which obviously cannot be used to accurately delete a record from database.
<asp:GridView
ID="gridTimeOff"
runat="server"
HeaderStyle-CssClass="gridHead"
RowStyle-CssClass="gridRow"
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How to get the DataKey value in RowDataBound event for GridView
View 3 RepliesI have a gridview with a DropDownList (contained in a TemplateField). I have set the OnSelectedIndexChanged event to a function called "ddlAgent_SelectedIndexChanged" This allows me to aquire when a user has changed the value for the dropdownlist. What I need to do is persist this newly selected value to the database for the gridview record. The problem I'm having is how to I get the datakeyNames value for that row? See code below!
TemplateField source
<asp:TemplateField HeaderText="Agent">
<ItemTemplate>
<asp:DropDownList ID="ddlAgent" runat="server" AutoPostBack="False" OnSelectedIndexChanged="ddlAgent_SelectedIndexChanged">
</asp:DropDownList>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center"></ItemStyle>
</asp:TemplateField>
ddlAgent_SelectedIndexChanged
Protected Sub ddlAgent_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim gvItems As DropDownList = CType(sender, DropDownList)
' Write the selected Agent ID to the Inquiry record.
'Dim ID As Integer = gvMaint.DataKeyNames(e.SelectedIndex).Value ' THIS FAILS BECAUSE
e.SelectedIndex is not part of System.EventArgs
End Sub
I have a gridview table and i need to select one record and insert the Datakey of the selected record to a formview textbox control. I'm completely lost...
View 13 RepliesThis is Film table in database
ID Daste Preference
1 film 5
2 serial 4
3 serial 1
4 film 2
And bind gridview from this table and ordred by Preference Column I put Linknbutton in gridview that code is:
protected void LinkButton11_Click(object sender, EventArgs e) {
GridViewRow row = (sender as LinkButton).NamingContainer as GridViewRow;
int id = Convert.ToInt32(GridView2.DataKeys[row.RowIndex].Value);
using (SqlConnection conn = General.GetConnection()) {
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Oroblem is in this line:
int id = Convert.ToInt32(GridView2.DataKeys[row.RowIndex].Value);
I want when I click on linkbutton it use Id but here it use Preference data How I can define that according to Id column it go to
Response.Redirect("EditFilm.aspx? &id=" + id);
I have an ObjectDataSource that is bound to a GridView. The object accepts a parameter from a TextBox. The problem I have is when I use a CustomerValidator with a ServerValidate event, the ObjectDataSource would still attempt to perform a DataBind despite the fact the the customer validator has returned false. The following is the code in the ASPX page.
<asp:TextBox ID="sittingDate" runat="server" />
<asp:CustomValidator ID="DateValidator" runat="server" ControlToValidate="sittingDate" OnServerValidate="DateValidator_ServerValidate" />
<asp:ObjectDataSource ID="BatchDataSource" runat="server" OldValuesParameterFormatString="original_{0}"
SelectMethod="GetOrCreateSittingBatch" TypeName="BatchBLL" OnSelected="BatchDataSource_Selected" OnSelecting="BatchDataSource_Selecting">
<SelectParameters>
<asp:ControlParameter ControlID="sittingDate" Name="batchDate" PropertyName="Text"
Type="DateTime" />
</SelectParameters>
</asp:ObjectDataSource>
<asp:GridView ID="BatchGridView" runat="server" DataSourceID="BatchDataSource">
In the Custom Validator I have
protected void DateValidator_ServerValidate(object source, ServerValidateEventArgs args)
{
/Ensure that the entered data is a date.
string input = args.Value;
DateTime result;
args.IsValid = DateTime.TryParse(input.TrimEnd(), out result);
}
How do I stop the ObjectDataSource from data binding when validation has failed?
I am binding SQL data to a GridView. The GridView's DataKeyNames property is set to the SQL column called "utID"
I know that within the SQL results, some of the utID values are NULL. After databinding to the GridView, I need to enumerate through the GridViewRows an read the DataKey values. However, when I try this I get the following error:
No default member found for type 'DBNull'. I am using the code below.
What object types are stored within DataKeys (I thought it was just integers or strings)
How to handle a NULL datakey value to prevent this error occurring?
I don't want to use Try Catch because it's too much of a 'hack'
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I have followed your Nested level gridview and found it working, but i want add a button in the child element(from your example i will have a btn in Product grid and it should get contact_id (parent datakey value as well) ),as i need to update in database.
View 1 RepliesHow can get datakey value of Nested(child) GridView on click on delete button of child grid
View 1 RepliesHow-to-bind-data-to-a-DropDownList-which-is-inside-a-GridView-in-ASPNet.aspx
it is possible, use OnSelectedIndexChanged method of the dropdownlist and take the id value of the row where is the dropdownlist.
<asp:DropDownList ID="ddlCountries" runat="server" onselectedindexchanged="GetId_SelectedIndexChanged">
c#
protected void GetId_SelectedIndexChanged(object sender, EventArgs e)
{
}
need to have the id of the row where is the dropdownlist, to make a query after.
How to get grid view datakey value in nested grid view in gridview_RowCommand
I have used this code but here it will not detecting grid view name
protected void gvDetails_RowCommand(object sender, GridViewCommandEventArgs e) {
string tempid = "";
switch (e.CommandName) {
case "cmdbtn":
int currentRowIndex = Convert.ToInt32(e.CommandArgument);
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I have used this code but here it will not detecting grid view name...
A GridView from EntityDataSource has an "Edit" link that takes the DataKey id (e.g., DataKeyNames = "PersonID", <asp:HyperLinkField
View 2 Repliesim reading checkbox value which is checked on my gridview but as per my code is missing the 1st one which on top but i select from the middle then it is working fine here is link for gridviewhelper classes [URL] and im calling this code from gridviewhelper classes on page load event
Dim helper As New GridViewHelper(Me.GridView2)
helper.RegisterGroup("heading", True, True)
AddHandler helper.GroupHeader, AddressOf helper_GroupHeader
and here is my code
Dim sc As New StringCollection()
Dim id As String = String.Empty
For i As Integer = 0 To GridView2.Rows.Count - 1
'loop the GridView Rows
Dim cb As CheckBox = DirectCast(GridView2.Rows(i).Cells(2).FindControl("CheckBox2"), CheckBox)
'find the CheckBox
If cb IsNot Nothing Then
If cb.Checked Then
id = GridView2.Rows(i).Cells(1).Text
sc.Add(id)
MsgBox(id)
End If
End If
Next
table a
a1 a
1 qw
2 asa
i have two grid views
gridview1 has check box[a1] and one value[a](in total two columns) with objectdatasource1 for datareferencing from database
another gridview2 has to select only the selected/checked value of gridview1 of checkbox1
I'm facing a wierd problem with GridView and ObjectDataSource. I bind GridView to my business objects via ObjectDataSource. Everything was working fine until I decided to add a new field in my buisness object and wanted to add a column to GridView to show it. Somehow that column is NOT shown in the GridView's list of available columns. I have tried refreshing schema, rebinding, etc. I'm using GridView inside a user control which is used as a web part. Does that make a difference ?
View 3 RepliesI have a grid that receives products over a GetList methods via ObjectDataSource. The Product class contains also a Object Supplier. If I change in the drop down list of the grid the supplier for a product and I click update the ID of the suppliier is still the same. I have debugged the call of the update method and checked the parameter in the product object. I wrote the following code in the SelectedIndexChanged event and the text box shows the right id but not the update method.
DropDownList supplier = (DropDownList) sender;
txtTest.Text = supplier.SelectedValue;
Here is the code of my grid view:
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My Object Data Source calls the following Update Method:
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The next work around idea would be to call the update method manually in the Update Event of the grid view.
Can you post of an example of Gridview with EditItemTemplate using ObjectDataSource as data connectionand Update the the specific row. Ihave lots of sleepness night with this problem.
View 2 Replies
