本文介绍了C#Datagridview更新和删除的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个gridview，需要编辑更新和从datagrid和我的sql服务器中删除.
问题出在我运行表单并想在datagridview中删除一行时删除了它，从而导致错误索引超出范围.
这是我的表格代码
I have a gridview that needs to edit update and delete from datagrid and from my sql server.
The problem is with my delete when i run my form and want to delete a row in my datagridview it gives an error index out of range.
Here is my form code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
using System.Configuration;
using System.Data.SqlClient;
using System.Windows.Forms.PropertyGridInternal;
namespace WindowsFormsApplication1
{
public partial class Form5 : Form
{
SqlConnection con = new SqlConnection(@"Data Source=Admin-PC\SQLEXPRESS;Initial Catalog=Couriers;Integrated Security=True");
public Form5()
{
InitializeComponent();
FormBorderStyle = FormBorderStyle.None;
WindowState = FormWindowState.Maximized;
TopMost = true;
Bind();
}
private void Clear()
{
textBox1.Text = string.Empty;
comboBox1.Text = string.Empty;
textBox7.Text = string.Empty;
textBox6.Text = string.Empty;
comboBox2.Text = string.Empty;
textBox4.Text = string.Empty;
textBox13.Text = string.Empty;
textBox2.Text = string.Empty;
textBox11.Text = string.Empty;
textBox9.Text = string.Empty;
textBox14.Text = string.Empty;
}
//save
private void button6_Click(object sender, EventArgs e)
{
con.Open();
SqlCommand cmd = new SqlCommand("Insert Into Waybills set (WaybillNumber,SenderName,SenderAdress,SenderContact,ReceiverName,ReceiverAdress,ReceiverContact,UnitDescription,UnitWeight,Price,Payee) Values (@WaybillNumber,@SenderName,@SenderAdress,@SenderContact,@ReceiverName,@ReceiverAdress,@ReceiverContact,@UnitDescription,@UnitWeight,@Price,@Payee)", con);
cmd.Parameters.AddWithValue("@WaybillNumber", textBox1.Text);
cmd.Parameters.AddWithValue("@SenderName", comboBox1.Text);
cmd.Parameters.AddWithValue("@SenderAddress", textBox7.Text);
cmd.Parameters.AddWithValue("@SenderContact", textBox7.Text);
cmd.Parameters.AddWithValue("@ReceiverName", comboBox2.Text);
cmd.Parameters.AddWithValue("@ReceiverAddress", textBox4.Text);
cmd.Parameters.AddWithValue("@ReceiverContact", textBox13.Text);
cmd.Parameters.AddWithValue("@UnitDescription", textBox2.Text);
cmd.Parameters.AddWithValue("@UnitWeight", textBox11.Text);
cmd.Parameters.AddWithValue("@Price", textBox9.Text);
cmd.Parameters.AddWithValue("@Payee", textBox14.Text);
cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("nEW DATA INSERTED");
Bind();
Clear();
dataGridView1.Refresh();
}
private void Bind()
{
con.Open();
SqlDataAdapter da = new SqlDataAdapter("Select * from Waybills", con);
DataTable dt = new DataTable();
da.Fill(dt);
dataGridView1.DataSource = dt;
con.Close();
}
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
}
private void Form5_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the 'couriersDataSet2.Waybills' table. You can move, or remove it, as needed.
this.waybillsTableAdapter1.Fill(this.couriersDataSet2.Waybills);
}
//view data
private void button1_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(@"Data Source=Admin-PC\SQLEXPRESS;Initial Catalog=Couriers;Integrated Security=True");
con.Open();
SqlDataAdapter ad = new SqlDataAdapter("select * from Waybills where WaybillNumber like '%" + textBox5.Text + "%'", con);
SqlCommandBuilder cb = new SqlCommandBuilder(ad);
DataSet ds = new DataSet();
ds.Clear();
ad.Fill(ds);
dataGridView1.DataSource = ds.Tables[0];
if (textBox5.Text == "" || ds.Tables[0].Rows.Count == 0)
{
dataGridView1.Visible = false;
}
else
{
dataGridView1.Visible = true;
con.Close();
}
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void button2_Click(object sender, EventArgs e)
{
Form2 f2 = new Form2();
f2.ShowDialog();
this.Close();
}
private void dataGridView1_CellContentClick_1(object sender, DataGridViewCellEventArgs e)
{
}
//edit
private void button3_Click(object sender, EventArgs e)
{
int i;
i = dataGridView1.SelectedCells[0].RowIndex;
textBox1.Text = dataGridView1.Rows[i].Cells[0].Value.ToString();
comboBox1.Text = dataGridView1.Rows[i].Cells[1].Value.ToString();
textBox7.Text = dataGridView1.Rows[i].Cells[2].Value.ToString();
textBox6.Text = dataGridView1.Rows[i].Cells[3].Value.ToString();
comboBox2.Text = dataGridView1.Rows[i].Cells[4].Value.ToString();
textBox4.Text = dataGridView1.Rows[i].Cells[5].Value.ToString();
textBox13.Text = dataGridView1.Rows[i].Cells[6].Value.ToString();
textBox2.Text = dataGridView1.Rows[i].Cells[7].Value.ToString();
textBox11.Text = dataGridView1.Rows[i].Cells[8].Value.ToString();
textBox9.Text = dataGridView1.Rows[i].Cells[9].Value.ToString();
textBox14.Text = dataGridView1.Rows[i].Cells[10].Value.ToString();
}
//delete rows
private void button4_Click(object sender, EventArgs e)
{
SqlCommand delcmd = new SqlCommand();
if (dataGridView1.Rows.Count > 1 && dataGridView1.SelectedRows[0].Index != dataGridView1.Rows.Count - 1)
{
delcmd.CommandText = " DELETE FROM Waybills WHERE WaybillNumber=" + dataGridView1.SelectedRows[0].Cells[0].Value.ToString() + "";
con.Open();
delcmd.Connection = con;
delcmd.ExecuteNonQuery();
con.Close();
dataGridView1.Rows.RemoveAt(dataGridView1.SelectedRows[0].Index);
MessageBox.Show("Waybill Deleted");
}
Bind();
}
//update
private void button5_Click(object sender, EventArgs e)
{
con.Open();
SqlCommand cmd = new SqlCommand("UPDATE Waybills set WaybillNumber = @WaybillNumber, SenderName = @SenderName, SenderAddress = @SenderAddress, SenderContact = @SenderContact, ReceiverName = @ReceiverName, ReceiverAddress = @ReceiverAddress, ReceiverContact = @ReceiverContact, UnitDescription = @UnitDescription, UnitWeight = @UnitWeight, Price = @Price, Payee = @Payee Where(WaybillNumber=@WaybillNumber)", con);
cmd.Parameters.AddWithValue("@WaybillNumber", textBox1.Text);
cmd.Parameters.AddWithValue("@SenderName", comboBox1.Text);
cmd.Parameters.AddWithValue("@SenderAddress", textBox7.Text);
cmd.Parameters.AddWithValue("@SenderContact", textBox7.Text);
cmd.Parameters.AddWithValue("@ReceiverName", comboBox2.Text);
cmd.Parameters.AddWithValue("@ReceiverAddress", textBox4.Text);
cmd.Parameters.AddWithValue("@ReceiverContact", textBox13.Text);
cmd.Parameters.AddWithValue("@UnitDescription", textBox2.Text);
cmd.Parameters.AddWithValue("@UnitWeight", textBox11.Text);
cmd.Parameters.AddWithValue("@Price", textBox9.Text);
cmd.Parameters.AddWithValue("@Payee", textBox14.Text);
cmd.ExecuteNonQuery();
MessageBox.Show("updated");
con.Close();
Bind();
Clear();
}
}
}
有人可以告诉我我的问题在哪里吗
Can someone tell me where my problem is
推荐答案
private void button4_Click(object sender, EventArgs e)
{
if(dataGridView1.SelectedRows[0].Index != -1)
{
SqlCommand delcmd = new SqlCommand();
if (dataGridView1.Rows.Count > 1 && dataGridView1.SelectedRows[0].Index != dataGridView1.Rows.Count - 1)
{
delcmd.CommandText = " DELETE FROM Waybills WHERE WaybillNumber=" + dataGridView1.SelectedRows[0].Cells[0].Value.ToString() + "";
con.Open();
delcmd.Connection = con;
delcmd.ExecuteNonQuery();
con.Close();
dataGridView1.Rows.RemoveAt(dataGridView1.SelectedRows[0].Index);
MessageBox.Show("Waybill Deleted");
}
Bind();
}
}
if (dataGridView1.Rows.Count > 1 && dataGridView1.SelectedRows[0].Index != dataGridView1.Rows.Count - 1)
尝试..
try with..
if (dataGridView1.Rows.Count >= 1 && dataGridView1.SelectedRows[0].Index == dataGridView1.Rows.Count - 1)
这篇关于C#Datagridview更新和删除的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！