datagridview | 易学教程

DataGridView Column Data to Array

阅读更多关于 DataGridView Column Data to Array

问题 Is it possible to transfer all data from a DataGridView column to string[] array ? Here is my code so far, unfortunately, it can't convert DataGridViewRow to int foreach (DataGridViewRow dgvrows in dgvDetail.Rows) { array[dgvrows] = dgvDetail.Rows[dgvrows].Cell[3].value.ToString().Trim; } 回答1: You can do it in various ways: Use a normal for -loop. The foreach is only syntactic sugar, the real work is always done with the good old for-loop. Use foreach and the DataGridViewRow.Index property to

DataGridView Column Data to Array

阅读更多关于 DataGridView Column Data to Array

Import Excel data to DataGridView in Visual Studio 2010

阅读更多关于 Import Excel data to DataGridView in Visual Studio 2010

问题 Please help to fix importing data from Excel document to DataGridView control with following code: private void button5_Click(object sender, EventArgs e) { Excel.Application app = new Microsoft.Office.Interop.Excel.Application(); Excel.Workbook workbook =app.Workbooks.Open(@"C:\Users\Admin\Desktop\Dropbox\Vandit's Folder\Internship\test.xlsx"); Excel.Worksheet worksheet = workbook.ActiveSheet; rcount = worksheet.UsedRange.Rows.Count; int i = 0; for(;i<rcount;i++) { dataGridView1.Rows[i].Cells

让DataGridView显示行号

阅读更多关于让DataGridView显示行号

本文转载自： https://www.cnblogs.com/junezhang/archive/2011/11/21/2257630.html 作者：JuneZhang 转载请注明该声明。如果DataGridView控件能显示行号，对我们寻找数据就非常方便，但DataGridView默认的属性中，不可设置显示行号。本文在DataGridView的RowPostPaint事件中进行绘制，实现了这个功能，其效果如下：为了表示行号，我们可以在DataGridView的RowPostPaint事件中进行绘制。RowPostPaint事件，具体可以参照MSDN。下面是实现代码： private void Form1_Load(object sender, System.EventArgs e) { dataGridView1.Dock = DockStyle.Fill; dataGridView1.DataSource = System.Drawing.Imaging.ImageCodecInfo.GetImageDecoders(); } private void dataGridView1_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e) { System.Drawing.Rectangle

C# DataGridViewCheckBoxColumn Hide/Gray-Out

阅读更多关于 C# DataGridViewCheckBoxColumn Hide/Gray-Out

问题 I have a DataGridView with several columns and several rows of data. One of the columns is a DataGridViewCheckBoxColumn and (based on the other data in the row) I would like the option to "hide" the checkbox in some rows. I know how to make it read only but I would prefer it to not show up at all or at least display differently (grayed out) than the other checkboxes. Is this possible? 回答1: Some workaround: make it read-only and change back color to gray. For one specific cell: dataGridView1

Visual Basic, How do I read each row in a datagrid?

阅读更多关于 Visual Basic, How do I read each row in a datagrid?

问题 I have a datagrid called DataGridView1, column A contains a name, column B contains a path to a file. How do I run some code for each row? What is the correct terminology for traversing a datagrid in this way? Example of what I need: For each row in DataGridView1 MessageBox.Show DataGridView1.ColumnA.text & "," & DataGridView1.ColumnB.text Thanks 回答1: You were nearly there, you need something like the following: For Each row As DataGridViewRow In DataGridView1.Rows If Not row.IsNewRow Then

How to verify if a DataGridViewCheckBoxCell is Checked

阅读更多关于 How to verify if a DataGridViewCheckBoxCell is Checked

问题 I have bound a data table to a DataGridView , this data table has a column called "Status" which is of type Boolean . I can set the value to true or false just fine via code. However, I can't figure out how to check to see if the given row is already checked or not. This is the code I am trying to use and compiling it shows the error "the specified cast is invalid". Any help would be appreciated. if (rowIndex >= 0) { var cbxCell = (DataGridViewCheckBoxCell)dgvScan.Rows[rowIndex].Cells["Status

How to verify if a DataGridViewCheckBoxCell is Checked

阅读更多关于 How to verify if a DataGridViewCheckBoxCell is Checked

why doesn't datagridview refresh?

阅读更多关于 why doesn't datagridview refresh?

问题 here is what happens after i press a button: dataGridView1.DataSource = ConnectandReadList(some_query); dataGridView1.Refresh(); please note that i am doing this with another control called chart1 and it works fine with it, it populates it with the new requeried data, but datagridview is just staying the same the first attempt is successful. however the second time i press it, it display the same thing! anyone know whether i am refreshing the datagridview correctly? 回答1: Little trick you can

disable the default Enter/Return key behavior in a datagridview

阅读更多关于 disable the default Enter/Return key behavior in a datagridview

问题 In vb.net datagridview the default Enter/Return key behavior is to move to the next row is there a quick and easy way to avoid that. Any suggestions are welcome 回答1: You can try something like this in the gridview key down event Private Sub DataGridView1_Keydown (...) Handlers DataGridView1.KeyDown If e.KeyCode = Keys.Enter Then ' Your code here e.SuppressKeyPress = True End If End Sub Another option would be to create a custom grid view control DataGridView.ProcessDataGridViewKey Method 回答2: