I would like to bound textbox with dropdownlist by a single datatable or datasource like we bound controls in winform by using BindingSource. I don’t want to use postback to do so.
My dropdownlist:

I am having a textbox with textmode=number in html

I need to add the hover over the column header. I added the code below on ItemDataBound and ItemCreated. However the hover didn’t work

I have been working with some pre existing asp.net webpages that use visual basic as the backend programming language in Visual Studio for just about a year now and I have been teaching myself as I go. However, I would like to get some actual training on this specific area to fill in the gaps in my knowledge.

I have a link button that has an image, where if I click it, it needs to open a pdf file in a new tab/window. I added the PDF File on the my code folder. I’m not sure if this is right. But definitely I got an error. So maybe someone can point me to the right direction on how to do this properly.

I have to extract data from my api to put it in a datagridview on my .net application but the content of the cells is empty even though the json data is correct

Tengo una aplicación web con varios webform en un hosting. Estoy intentando que cuando se acceda a un enlace que apunte a un webform, se pueda crear el acceso directo desde un control botton que se muestre. Lo he intentado instalando la aplicación, pero en los smartphone no se comporta como yo espero, sin embargo cuando se accede a un enlace desde el smartphone, no hay problemas de navegación hacia delante o detrás, tampoco se queda la ultima pagina, quiero decir que si funcionando con la aplicación me da un error por ejemplo de redireccionamiento,(que no lo da cuando trabajo desde acceso directo) la pagina de error del navegador se queda en la aplicación y cuando vuelve a ejecutar la APP, se vuelve a mostrar la pagina de error, aunque se elimine el historial de navegación y cookies. Cuando se accede a la aplicación por una url desde el navegador, se que es mas cutre pero no falla nunca y cuando actualizo la aplicación no hay grandes esperas etc. Por eso veo mejor crear un acceso directo en la pantalla de inicio en vez de instalar la aplicación. ¿Alguien me puede indicar como ? os lo agradecería enormemente.

I have installed a package in my asp.net application. I have hosted the app using free tier of somee platform. The app is crashing since the package is not registered with somee. I have uploaded the bin folder which contains the dll files for the package but the app is crashing on importing class from the package.

I’m still learning about postbacks etc, but I can’t work out why I have to click the following requires me to click the ‘Submit’ button twice. It simply needs to populate the textbox with the querystring text for editing. If you don’t edit anything and click submit, it redirects to kitchen.aspx as required, but if you click into the textbox and edit the text, then click submit, you need to click submit again.