C#数据网格视图未注册按键

Question

我有一个带有数据网格视图控件的winform。有一次，我可以使用向上和向下箭头导航网格视图中的行，并按下表单捕获的用户键，以允许管理员输入代码进入管理面板。

现在，由于某些原因，datagridview将不会注册按键，并且form_KeyDown事件不会在任何键被按下时触发。

网格视图的任何键事件都不会被重写，并且窗体的KeyPreview属性设置为true。

要让数据网格视图注册关键字，我还需要检查或更改哪些内容？

编辑我想不出任何相关的实际代码。这是处理按键操作的唯一事件。但是这个事件并没有触发。

this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.frm1_KeyDown); 

 private void frm1_KeyDown(object sender, KeyEventArgs e)
    {
        //omitted
    }

正如我所说的，除了这个，没有处理按键的代码，它也不会触发。

以下是keydown事件代码

下面是为数据网格视图生成的代码

// 
        // dgvMachines
        // 
        this.dgvMachines.AllowUserToAddRows = false;
        this.dgvMachines.AllowUserToDeleteRows = false;
        this.dgvMachines.AllowUserToOrderColumns = true;
        dataGridViewCellStyle1.BackColor = System.Drawing.Color.LightGray;
        this.dgvMachines.AlternatingRowsDefaultCellStyle = dataGridViewCellStyle1;
        this.dgvMachines.AutoGenerateColumns = false;
        this.dgvMachines.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.Fill;
        this.dgvMachines.AutoSizeRowsMode = System.Windows.Forms.DataGridViewAutoSizeRowsMode.DisplayedCells;
        dataGridViewCellStyle2.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleLeft;
        dataGridViewCellStyle2.BackColor = System.Drawing.SystemColors.Control;
        dataGridViewCellStyle2.Font = new System.Drawing.Font("Microsoft Sans Serif", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
        dataGridViewCellStyle2.ForeColor = System.Drawing.SystemColors.WindowText;
        dataGridViewCellStyle2.SelectionBackColor = System.Drawing.SystemColors.Highlight;
        dataGridViewCellStyle2.SelectionForeColor = System.Drawing.SystemColors.HighlightText;
        dataGridViewCellStyle2.WrapMode = System.Windows.Forms.DataGridViewTriState.True;
        this.dgvMachines.ColumnHeadersDefaultCellStyle = dataGridViewCellStyle2;
        this.dgvMachines.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
        this.dgvMachines.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
        this.clmDomain,
        this.clmMachineName,
        this.ClmMachineDescription,
        this.clmRDPName,
        this.clmRDPPassword,
        this.ClmUserName,
        this.ClmLoginTime,
        this.clmStatus,
        this.clmIPAddress,
        this.clmID,
        this.clmSourceHostName});
        this.dgvMachines.DataSource = this.bsMachineDGRow;
        dataGridViewCellStyle8.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleLeft;
        dataGridViewCellStyle8.BackColor = System.Drawing.SystemColors.Window;
        dataGridViewCellStyle8.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
        dataGridViewCellStyle8.ForeColor = System.Drawing.SystemColors.ControlText;
        dataGridViewCellStyle8.SelectionBackColor = System.Drawing.SystemColors.Highlight;
        dataGridViewCellStyle8.SelectionForeColor = System.Drawing.SystemColors.HighlightText;
        dataGridViewCellStyle8.WrapMode = System.Windows.Forms.DataGridViewTriState.False;
        this.dgvMachines.DefaultCellStyle = dataGridViewCellStyle8;
        this.dgvMachines.EditMode = System.Windows.Forms.DataGridViewEditMode.EditOnF2;
        this.dgvMachines.Location = new System.Drawing.Point(24, 65);
        this.dgvMachines.MultiSelect = false;
        this.dgvMachines.Name = "dgvMachines";
        dataGridViewCellStyle9.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleLeft;
        dataGridViewCellStyle9.BackColor = System.Drawing.SystemColors.Control;
        dataGridViewCellStyle9.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
        dataGridViewCellStyle9.ForeColor = System.Drawing.SystemColors.WindowText;
        dataGridViewCellStyle9.SelectionBackColor = System.Drawing.SystemColors.Highlight;
        dataGridViewCellStyle9.SelectionForeColor = System.Drawing.SystemColors.HighlightText;
        dataGridViewCellStyle9.WrapMode = System.Windows.Forms.DataGridViewTriState.True;
        this.dgvMachines.RowHeadersDefaultCellStyle = dataGridViewCellStyle9;
        this.dgvMachines.RowHeadersVisible = false;
        this.dgvMachines.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect;
        this.dgvMachines.Size = new System.Drawing.Size(753, 510);
        this.dgvMachines.TabIndex = 28;
        this.dgvMachines.CellClick += new System.Windows.Forms.DataGridViewCellEventHandler(this.dgvMachines_CellClick);
        this.dgvMachines.CellDoubleClick += new System.Windows.Forms.DataGridViewCellEventHandler(this.dgvMachines_CellDoubleClick);
        this.dgvMachines.RowEnter += new System.Windows.Forms.DataGridViewCellEventHandler(this.dgvMachines_RowEnter);
        this.dgvMachines.MouseDown += new System.Windows.Forms.MouseEventHandler(this.dgvMachines_MouseDown);

Answer 1

尝试将表单中的KeyPreview属性更改为false。datagridview本身能够处理箭头键。

另一个可能导致问题的属性是SelectionMode：如果设置为FullRowSelect，则不能在单元格之间导航。

如果您需要用户输入代码，请提供一个textBox以在此处输入代码，然后执行取消搜索