Forms Data Controls :: Unable To Set The SelectedValue Of DropDownList

Jun 15, 2010

My page has a gridview, and the gridview has a TemplateField called "Acciones" (Actions). The column Acciones has a ImageButton with CommandName "Select" and CommandArgument "Tutor". Thus, the GridView has controlled event "SelectedIndexChanged". The idea is that in GV_SelectedIndexChanged, I must to set DropDownList's SelectedValue property. But, the value seted in this function don't affect the rendered dropdownlist. The debugger talk's that the value is correctly seted, but the visual result don't.

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Forms Data Controls :: Dropdownlist Selectedvalue Does Not Exist Error?

Mar 2, 2011

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Forms Data Controls :: Get Value Of Dropdownlist Selectedvalue - Created Dynamically Inside Gridview

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Jun 28, 2010

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[URL]

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[Code]....

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for(int i = 60; i <= 80; i++)
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Initial State
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I have two dropdownlists ddl1 & ddl2, both of which are inside a GridView.

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Jun 9, 2013

Before this, everything is fine when running the project After I've put "SelectedValue" below to the field,

<asp:TemplateField HeaderText="Interest">
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[CODE]

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May 7, 2015

I got this error when select a row from a grid view to update

'ddl_ctegOf_Product_update' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value
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.ArgumentOutOfRangeException: 'ddl_ctegOf_Product_update' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value

Source Error: 
Line 265: txt_prodID_update.Text = gridTo_updateFrom.SelectedRow.Cells[1].Text;
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The code of update:

 private void PopulateDropDownList() {
string constr = ConfigurationManager.ConnectionStrings[1].ConnectionString;
using (SqlConnection con = new SqlConnection(constr)) {
using (SqlCommand cmd = new SqlCommand("SELECT CategoryProd_ID,Cate_Pro_Name FROM CategoryOfProduct", con)) {
using (SqlDataAdapter da = new SqlDataAdapter(cmd))

[Code] .....

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I want to update the data using vb.net , my webpage has many dropdownlistlist ,

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I have a slight issue I awas trying to fix for 2-3 days, but nothing I try works.

The scenario:

DetailsView control in edit mode, I pass parameters to the SqlDataSourceProducts (edit.aspx?id=2) and the data source selects the appropriate data and fills in the DetailsView form.

Except two drop down lists. These two DDLs (DDL2 and DDL3) are dependent on the previous DDL (DDL1) in the DetailsView.

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I can go for not binding the data unless the field is changed, but does not sound professional and user friendly.

code:

The SqlDataSource used to select the parameters from the table and populate the DetailsView

[Code]....

The code of the fields that hold the DDLs in the DetailsView control

[Code]....

The codebehind:

[Code]....

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[Code]....

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[Code]....

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[Code]....
[Code]....

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[Code]....

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Jul 15, 2010

In SQL, you can create a query and use a "IN".. Select * from tOffices where OfficeID in ('1', '2', '3'). Is it possible, in my vb.net code behind to check if a selected value is "in" a list of values like this?

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