datagridviewcomboboxcell

C# DataGridView DataGridViewTextCell to DataGridViewComboBoxCell editable text

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问题 I have a DataGridView with a TextBoxColumn. I would like to be able to click on the cell to enter edit mode, and when I do a drop down will appear with options for the user to pick, or if the user does not want one of those options, they are able to edit the cell (as if there was no drop down). Then when the user leaves the cell, the value (either what they typed, or what they chose) will be saved. There are lots of answers to adding the user typed choice to the drop down list, but this is

DataMember Error when firing CellValueChanged

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问题 Following my anterior question about changing values on column cells according a comboboxcolumncells , now I have the following problem. My event fires, but I get the following error message on the DataBindings line: can't link the property or function "value" in DataSource. Parameter Name: dataMember . Aside of that, the values of the other columns didn't changed. What should I do in this case? Private Sub dgv_CellValueChanged(ByVal sender As Object, ByVal e As DataGridViewCellEventArgs)

Get the SelectedItem of DataGridViewComboBoxCell VB.NET

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问题 Very good afternoon to all, The problem I have now is that I can not get the value selected as a combobox, I'm trying to set the text and value to each item in the combobox of each cell in the datagrid. My Code: CLASS MyListItem: Public Class MyListItem Private mText As String Private mValue As String Public Sub New(ByVal pText As String, ByVal pValue As String) mText = pText mValue = pValue End Sub Public ReadOnly Property Text() As String Get Return mText End Get End Property Public

DataGridView databinding

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问题 I give a simple example to explain what I want: I defined a class called Student , it has two properties: Name and Subjects . public class Student() { public string Name; public List<string> Subjects; } I created two instances of Student class, for example: List<string> jackSubjects = new List<string>(); jackSubjects.Add("Math"); jackSubjects.Add("Physics"); Student Jack = new Student("Jack", jackSubjects); List<string> alanSubjects = new List<string>(); alanSubjects.Add("Accounting");

DataGridView autoComplete comboBox column not retaining values on initial cell leave

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问题 I have a bound dataGridView with an autoComplete combobox column and the autocomplete is working except that am observing one behaviour thats abit irritating. When i type text in the autocomplete cell for the first time and move to the next cell with the tabKey, my selection is not retained, what ever i selected is cleared and the autocomplete cell is left null. If ii immediately use the left arrow key to return to that autocomplete cell and type in text, what ever i select is retained with

How to programatically populate a DataGridViewComboBoxColumn in VB.net?

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问题 I have been scratching my head for a while over this. So I have added in design mode a datagridview to my form. The datagridview has 2 columns, one column is textbox column, the other column is combobox column. I have figured out how to programmatically populate the cells of a textbox, however I can't figure out which property to use to populate the combobox column. I am simply looking to have a dropdown with 3 options. Any ideas would be great. P.S: I just picked up VB.net 2 days ago so I

Dynamically setting DataGridViewComboBoxCell's DataSource to filtered DataView based off of other cell selection

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问题 I have been looking high and low for a way to do the following, but to no avail. I came up with a solution that works, but am wondering if there is a better way of handling it. The Problem: I am using a DataGridView that has two DataGridViewComboBoxColumn, col1 and col2. col1 has had its DataSource set to a DataTable. Based off of the selection from a given cell in col1, I would like to have the respective col2 cell in the same row have its DataSource set to be a filtered DataView of col2's

How to switch between DataGridViewTextBoxCell and DataGridViewComboBoxCell?

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问题 I want to have a DataGridView that has two columns. The first column will always be of type DataGridViewComboBoxColumn. Based on the selection in that column, I'd like to be able to change the corresponding cell in the second column to either a DataGridViewComboBoxCell or a DataGridViewTextBoxCell. I'm thinking I just need to make the second column of type DataGridViewColumn, but don't understand the mechanics of how to change the cell type on the fly. I'm working with VB.NET in Visual Studio

Dynamically setting DataGridViewComboBoxCell's DataSource to filtered DataView based off of other cell selection

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I have been looking high and low for a way to do the following, but to no avail. I came up with a solution that works, but am wondering if there is a better way of handling it. The Problem: I am using a DataGridView that has two DataGridViewComboBoxColumn, col1 and col2. col1 has had its DataSource set to a DataTable. Based off of the selection from a given cell in col1, I would like to have the respective col2 cell in the same row have its DataSource set to be a filtered DataView of col2's DataSource. The abbreviated code from my current implementation might better help describe what I am

Databinding a combobox column to a datagridview per row (not the entire column)

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There are a few posts about this, but after hours of searching I still can't find what I need. The answer in the following post almost gets me what I want: Combobox for Foreign Key in DataGridView Question 1: Going off that example where a Product has many Licenses, my database mappings are all many-to-one relationships which means my License class holds a reference to the Product class. The License class does not have a property for the ProductId since that can be retrieved via the Product reference. I don't want to muck up the License class with both a reference to Product and a ProductId