Question

此代码插入数据库

 private void btnSave_Click(object sender, EventArgs e)
    {
        byte[] imageBt = null;
        FileStream fstream = new FileStream(this.txtImgPath.Text,FileMode.Open,FileAccess.Read);
        BinaryReader Br = new BinaryReader(fstream);
        imageBt = Br.ReadBytes((int)fstream.Length);
       // byte[] pic = stream.ToArray();
        try
        {
            conDB.Open();
            OleDbCommand command = new OleDbCommand();
            command.Connection = conDB;
            command.CommandText = "insert into abaanaCC (CCSpn_CODE,CCFname,CCLname,CCMname,CCDOB,CCgender,CCSchool,CaClass,CCVillage,CCSiblings,CCGuardian,CCContact,CCImage)" +
                " values ('" + spn_codetxt.Text + "','" + txtfname.Text + "','" + lnametxt.Text + "','" + mnametxt.Text + "','" + DOBDTPicker1.Text + "','" + gendercomboBox.Text + "','" + schtxt.Text + "','" + classcomboBox.Text + "','" + villatxt.Text + "','" + siblingscombobx.Text + "','" + guardiantxt.Text + "','" + contacttxt.Text + "',@IMG) ";
            command.Parameters.Add(new OleDbParameter("@IMG",imageBt));
            //command.Parameters.AddWithValue("@IMG",pic);
            command.ExecuteNonQuery();
            MessageBox.Show("Record Saved");
        }
        catch (Exception ex)
        {
            MessageBox.Show("Unable to save" + ex);
        }
        conDB.Close();
    }

然后这是针对datagridview

private void Update_Load(object sender, EventArgs e)
    {
        // TODO: This line of code loads data into the 'abaanaDataSet.abaanaCC' table. You can move, or remove it, as needed.
        this.abaanaCCTableAdapter.Fill(this.abaanaDataSet.abaanaCC);

    }

正在使用单元格点击事件，以便在单击某个单元格时，会显示该行的内容，即CCImage和CCSpn_CODE。 CCSpn_CODE出现在Ptxtspn_code textBox就好了。问题是我正在转换的byte []图像。它只显示第一行的图像。我如何PpicBox显示我点击datagridView的任何行中的任何图片，就像Ptxtspn_code textBox

一样

 private void abaanaCCDataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
    {
            this.Ptxtspn_code.Text = this.abaanaCCDataGridView.SelectedRows[0].Cells[this.dataGridViewTextBoxColumn2.Name].Value.ToString();
this.abaanaCCTableAdapter.Fill(this.abaanaDataSet.abaanaCC);           
byte[] mydata = (byte[])this.abaanaDataSet.abaanaCC.Rows[0]["CCImage"];
          MemoryStream stream = new MemoryStream(mydata);           
         this.PpicBox.Image =Image.FromStream(stream);

 }

Answer 1

注意：

在CellClick事件中，您应该检查点击是否在行标题或列标题
e.RowIndex是已点击单元格的行索引，e.ColumnIndex是已点击单元格列的索引
要获取点击行的值，您可以使用：
- yourDGV.Rows[e.RowIndex].Cells["GridColumnName"].value
- yourDGV.Rows[e.RowIndex].Cells[2].Value
- ((DataRowView)yourDGV.Rows[e.RowIndex].DataBoundItem)[2]
- ((DataRowView)yourDGV.Rows[e.RowIndex].DataBoundItem)["DataTableColumnName"]
我不知道为什么你在CellClick中填写abaanaCC，因为你在表单加载事件中加载数据，所以包括CCImage在内的所有值都存在于你的数据表中。所以我删除了它。看来只有当你想在单元格点击中加载不在这里的数据时才应填写它。

例如，您的代码可能是这样的：

private void abaanaCCDataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
{
    if (e.RowIndex < 0 || e.ColumnIndex < 0)
        return;

    this.Ptxtspn_code.Text = this.abaanaCCDataGridView.Rows[e.RowIndex].Cells[this.dataGridViewTextBoxColumn2.Name].Value.ToString();       
    byte[] mydata = (byte[])this.abaanaDataSet.abaanaCC.Rows[r.RowIndex]["CCImage"];
    MemoryStream stream = new MemoryStream(mydata);           
    this.PpicBox.Image =Image.FromStream(stream);
}

如何从datagridview创建主详细信息

1 个答案: