Visual Studio 2019工具箱DataGridView不可用，无法拖拽求解决方案及替代控件

Hey there! I totally get how frustrating it is when a "simple" tutorial step doesn't work as expected—let's break this down and get you sorted out.

Let's start with troubleshooting why you can't drag the DataGridView to your form even after adding it via Choose Toolbox Items:

• Check if the Toolbox is locked: Right-click anywhere in the Toolbox and make sure the Locked option isn't checked. A locked Toolbox won't let you drag any controls.
• Verify your project type: Double-check that you're working in a true Windows Forms project. Open your .csproj file and confirm it has these lines (if you're using .NET Core/.NET 5+):

  <Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
    <PropertyGroup>
      <UseWindowsForms>true</UseWindowsForms>
    </PropertyGroup>
  </Project>
  

  If you're on .NET Framework, ensure the project template was set to "Windows Forms App".
• Reset the Toolbox: Sometimes the Toolbox gets corrupted. Right-click the Toolbox, select Reset Toolbox, then re-add the DataGridView via Choose Toolbox Items again. This clears any cached glitches.
• Test with a clean project: Create a brand new Windows Forms project and try dragging the DataGridView there. If it works, your original project's designer might be damaged—check your Form.Designer.cs file for any invalid code, or try recreating the form.

If fixing the designer issue doesn't pan out, here are solid alternatives to show your DataTable data:

1. Manually Add DataGridView via Code #

Skip the designer entirely and create/bind the control in code. This bypasses any Toolbox/designer bugs. Add this to your form's Load event:

private void Form1_Load(object sender, EventArgs e)
{
    // Assume yourDataTable is already populated
    DataGridView dgv = new DataGridView();
    dgv.Dock = DockStyle.Fill; // Makes the grid fill the entire form
    dgv.AutoGenerateColumns = true; // Automatically creates columns from your DataTable
    dgv.DataSource = yourDataTable;
    
    this.Controls.Add(dgv);
}

2. Use ListView (Details Mode) #

For simpler display needs, a ListView set to Details mode can work. It doesn't have all of DataGridView's features (like built-in editing or sorting), but it's easy to set up:

private void BindDataToListView(DataTable dataTable)
{
    listView1.View = View.Details;
    listView1.GridLines = true;
    
    // Add columns from the DataTable
    foreach (DataColumn column in dataTable.Columns)
    {
        listView1.Columns.Add(column.ColumnName);
    }
    
    // Add rows
    foreach (DataRow row in dataTable.Rows)
    {
        ListViewItem item = new ListViewItem(row[0].ToString());
        for (int i = 1; i < dataTable.Columns.Count; i++)
        {
            item.SubItems.Add(row[i].ToString());
        }
        listView1.Items.Add(item);
    }
}

3. Third-Party Grid Controls (Optional) #

If you need advanced features later, libraries like DevExpress GridControl or Telerik RadGridView offer robust alternatives—but these require installing external packages, so they're better for more complex projects once you're comfortable with WinForms basics.

4. Manual GDI+ Drawing (Advanced) #

You could draw the table directly on the form using GDI+ methods, but this is tedious and not recommended for beginners unless you have a very specific layout need.

Start with the troubleshooting steps first—chances are it's just a Toolbox or project configuration glitch. If those fail, the code-based DataGridView approach is the closest replacement to the designer workflow.

内容的提问来源于stack exchange，提问作者Pablo Aguirre de Souza