C# WinForm 实现DataGridView中DataGridViewCheckBoxCell的变通单一勾选

默认情况下 DataGridViewCheckBoxColumn 是可以多选的

某些情况下 我们需要利用CheckBox的可勾选及取消勾选的属性

来提供给用户选择项 同时需要勾选某项后 其他行的就取消勾选

如一组人员中 选择一个组长

相关示例代码如下：

//m_PreRoleID 之前组长的UserID

//strCurrectChooseUserID 当前选择的组长的UserID

//DataGridView绑定事件

private void InitDataGridViewBind()

{

    DataTable dtNew = new DataTable();

    dtNew = GlobalStatic.gs_myWS.MonitorGetUserIDInfo().Tables[0];

    //UserID , UserDesc , RoleName

    DataColumn colisChecked = new DataColumn("isChecked");

    colisChecked.DefaultValue = false;

    dtNew.Columns.Add(colisChecked);

    for (int i = 0; i < dtNew.Rows.Count; i++)

    {

        DataRow dr = dtNew.Rows[i];

        if (dtNew.Rows[i]["UserID"].ToString() == m_PreRoleID)

        {

            dtNew.Rows[i]["IsChecked"] = true;

            strCurrectChooseUserID = m_PreRoleID;

            break;

        }

    }

    this.dataGridView1.AutoGenerateColumns = false;

    this.dataGridView1.DataSource = dtNew;

}

//

private void dataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)

{

    if (e.ColumnIndex != -1 && e.RowIndex != -1)

    {

        if (((DataGridViewTextBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["RoleName"]).Value.ToString() == "组长")

        {

            if (((DataGridViewTextBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["UserID"]).Value.ToString() != m_PreRoleID)

            {

                MessageInfoForm.Show("该客户端ID已被其他客户端配置使用 不能再用于本客户端的配置");

            }

            else

            {

                if (e.ColumnIndex != 0)

                {

                    ((DataGridViewCheckBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["ColIsChecked"]).Value = true;//选择当前行的CheckBox 并空置其他的行

                    for (int i = 0; i < this.dataGridView1.Rows.Count; i++)

                    {

                        if (i != e.RowIndex)

                        {

                            ((DataGridViewCheckBoxCell)this.dataGridView1.Rows[i].Cells["ColIsChecked"]).Value = false;

                        }

                    }

                    this.dataGridView1.Rows[e.RowIndex].Selected = true;

                    strCurrectChooseUserID = ((DataGridViewTextBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["UserID"]).Value.ToString();

                }

                else

                {

                    if (((DataGridViewCheckBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["ColIsChecked"]).Value.ToString() == "True")

                    {

                        strCurrectChooseUserID = "";

                        ((DataGridViewCheckBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["ColIsChecked"]).Value = false;

                    }

                    else

                    {

                        strCurrectChooseUserID = ((DataGridViewTextBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["UserID"]).Value.ToString();

                        for (int i = 0; i < this.dataGridView1.Rows.Count; i++)

                        {

                            if (i != e.RowIndex)

                            {

                                ((DataGridViewCheckBoxCell)this.dataGridView1.Rows[i].Cells["ColIsChecked"]).Value = false;

                            }

                        }

                        ((DataGridViewCheckBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["ColIsChecked"]).Value = true;

                    }

                }

            }

        }

        else

        {

            if (e.ColumnIndex != 0)

            {

                for (int i = 0; i < this.dataGridView1.Rows.Count; i++)

                {

                    if (i != e.RowIndex)

                    {

                        ((DataGridViewCheckBoxCell)this.dataGridView1.Rows[i].Cells["ColIsChecked"]).Value = false;

                    }

                }

                ((DataGridViewCheckBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["ColIsChecked"]).Value = true;//选择当前行的CheckBox 并空置其他的行

                this.dataGridView1.Rows[e.RowIndex].Selected = true;

                strCurrectChooseUserID = ((DataGridViewTextBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["UserID"]).Value.ToString();

            }

            else

            {

                if (((DataGridViewCheckBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["ColIsChecked"]).Value.ToString() == "True")

                {

                    strCurrectChooseUserID = "";

                    ((DataGridViewCheckBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["ColIsChecked"]).Value = false;

                }

                else

                {

                    strCurrectChooseUserID = ((DataGridViewTextBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["UserID"]).Value.ToString();

                    for (int i = 0; i < this.dataGridView1.Rows.Count; i++)

                    {

                        if (i != e.RowIndex)

                        {

                            ((DataGridViewCheckBoxCell)this.dataGridView1.Rows[i].Cells["ColIsChecked"]).Value = false;

                        }

                    }

                    ((DataGridViewCheckBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["ColIsChecked"]).Value = true;

                }

            }

        }

    }

}

//上任组长显蓝色

//当前选择的组长显红色

//一般组员默认黑色

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)

{

    if (((DataGridViewTextBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["RoleName"]).Value.ToString() == "组长")

    {

        if (((DataGridViewTextBoxCell)this.dataGridView1.Rows[e.RowIndex].Cells["UserID"]).Value.ToString() == m_PreRoleID)

        {

            this.dataGridView1.Rows[e.RowIndex].Cells["RoleName"].Style.ForeColor = Color.Blue;

        }

        else

        {

            this.dataGridView1.Rows[e.RowIndex].Cells["RoleName"].Style.ForeColor = Color.Red;

        }

    }

}