Question

我是C＃.net的新手。我想让dataGridView单元格单击单元格值到另一个表单的文本框，但无法找到正确的方法。我有两个表单1. UserPanelfrm和2. frmAddProjects。 UserPanelFrm由dataGridView组成，它显示了数据库中的项目列表。我想显示双击单元格的单元格信息，以便在frmAddProjects的文本框中显示。

ProjectClass.cs的代码

public class ProjectClass
{
    SqlConnection conn = new SqlConnection(DataConnectionClass.DbConnection);
    public int ManageProject(int ProjectID, String BusinessName, String ContactPerson, String Phone, String Address, String CreatedDate, String AssignedTo, String Mode)
    {
        try
        {
            int result = 0;
            SqlCommand cmd = new SqlCommand("sp_ManageProject", conn);
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddWithValue("@ProjectID", ProjectID);
            cmd.Parameters.AddWithValue("@BusinessName", BusinessName);
            cmd.Parameters.AddWithValue("@ContactPerson", ContactPerson);
            cmd.Parameters.AddWithValue("@Phone", Phone);
            cmd.Parameters.AddWithValue("@Address", Address);
            cmd.Parameters.AddWithValue("@CreatedDate", CreatedDate);
            cmd.Parameters.AddWithValue("@AssignedTo", AssignedTo);
            cmd.Parameters.AddWithValue("@Mode", Mode);
            conn.Open();
            result = cmd.ExecuteNonQuery();
            conn.Close();
            return result;
        }
        catch (Exception ex)
        {

            throw ex;
        }

         }
    public DataTable SelectAllProjects()
    {
        try
        {
            SqlCommand cmd = new SqlCommand("Select ID,ProjectID,BusinessName,ContactPerson,Phone,Address,CreatedDate,AssignedTo from tbl_ProjectInformation", conn);
            DataTable dt = new DataTable();
            conn.Open();
            SqlDataReader dr = cmd.ExecuteReader();
            dt.Load(dr);
            conn.Close();
            return dt;
        }
        catch (Exception ex)
        {

            throw ex;
        }
    }
}

将ProjectList调用到UserPanelfrm的代码dgvProjectDetails：

ProjectClass pc = new ProjectClass();
dgvProjectDetails.DataSource = pc.SelectAllProjects();

cellclick的代码

    private void dgvProjectDetails_CellContentClick(object sender, DataGridViewCellEventArgs e)
    {

DataGridViewCell cell = null;
        foreach (DataGridViewCell selectedCell in dgvProjectDetails.SelectedCells)
        {
            cell = selectedCell;
            break;
        }
        if (cell != null)
        {
            DataGridViewRow row = cell.OwningRow;
            frmAddProjects.projectid = row.Cells["ProjectID"].Value.ToString();
            frmAddProjects.businessname = row.Cells["BusinessName"].Value.ToString();
            frmAddProjects.contactperson = row.Cells["ContactPerson"].Value.ToString();
            frmAddProjects.phone = row.Cells["Phone"].Value.ToString();
            frmAddProjects.address = row.Cells["Address"].Value.ToString();
            frmAddProjects.createddate = row.Cells["CreatedDate"].Value.ToString();
            frmAddProjects.assignedto= row.Cells["AssignedTo"].Value.ToString();
            // etc.
            frmAddProjects ProjectDetail = new frmAddProjects();
            ProjectDetail.ShowDialog();
        }
}

frmAddProjects代码：

public static string projectid, businessname,contactperson,phone,address,createddate,assignedto;
     public frmAddProjects()
    {
        InitializeComponent();

    }

public void fillRecord()
    {
        txtProjectID.Text = projectid;
        txtBusinessName.Text = businessname;
        txtContactPerson.Text = contactperson;
        txtPhone.Text = phone;
        txtAddress.Text = address;
        dTPCreatedDate.Text = createddate;
        cmbAssignedTo.Text = assignedto;
    }

Answer 1

如果要在另一种形式的TextBox中显示双击后GridDataView中单元格的内容，首先必须使用CellMouseDoubleClick事件。

建议：

    private void dgvProjectDetails_CellMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e)
    {
        int col = e.ColumnIndex;
        int row = e.RowIndex;

        DataGridView dgv = sender as DataGridView;
        if (dgv == null)
            return;

        var cell = dgv[col, row];

        if (cell != null)
        {
            DataGridViewRow row = cell.OwningRow;
            frmAddProjects ProjectDetail = new frmAddProjects(); //<= THIS must be created first

            ProjectDetail.projectid = row.Cells["ProjectID"].Value.ToString();
            ProjectDetail.businessname = row.Cells["BusinessName"].Value.ToString();
            ProjectDetail.contactperson = row.Cells["ContactPerson"].Value.ToString();
            ProjectDetail.phone = row.Cells["Phone"].Value.ToString();
            ProjectDetail.address = row.Cells["Address"].Value.ToString();
            ProjectDetail.createddate = row.Cells["CreatedDate"].Value.ToString();
            ProjectDetail.assignedto= row.Cells["AssignedTo"].Value.ToString();
            // etc.

            ProjectDetail.ShowDialog();
        }            
    }

我假设frmAddProjects中的所有字段都是公开的。通过你的代码，它们似乎是＆＃34; static＆＃34;，这是在实例化这种类型的对象之前设置它们的唯一方法，但我做的就像它们只是公共属性一样。

在DataGridView中检索选定的行/单元格值从一种形式到另一种形式

1 个答案: