C#对DataGridView进行添加、修改、删除数据操作

数据库用的是本地服务器（MySql）：

设定全局变量：

MySqlConnection conn;

MySqlDataAdapter adapter;

MySqlTransaction trans;

1. // 数据库联接

private System.Data.DataTable dbconn(string strSql)

{

string strconn = "host=localhost;database=test;user id=root;password=";

conn = new MySqlConnection();

conn.ConnectionString = strconn;

conn.Open();

this.adapter = new MySqlDataAdapter(strSql, conn);

System.Data.DataTable dtSelect = new System.Data.DataTable();

int rnt=this.adapter.Fill(dtSelect);

conn.Close();

return dtSelect;

}

2. //设定DataGridView的样式

private void setDgStyle()

{

this.dgselect.Columns.Clear();

DataGridViewCheckBoxColumn colDel = new DataGridViewCheckBoxColumn();

colDel.DataPropertyName = "Del";

colDel.Name = "Del";

colDel.Selected = false;

colDel.FalseValue = "0";

colDel.TrueValue = "1";

colDel.Width = 40;

colDel.SortMode = DataGridViewColumnSortMode.NotSortable;

colDel.HeaderText = "删除";

colDel.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter;

colDel.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;

this.dgselect.Columns.Insert(0, colDel);

DataGridViewTextBoxColumn colID = new DataGridViewTextBoxColumn();

colID.DataPropertyName = "ProductsSpecID";

colID.Name = "ProductsSpecID";

colID.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter;

colID.HeaderText = "产品规格ＩＤ";

colID.Width = 160;

this.dgselect.Columns.Insert(1, colID);

DataGridViewTextBoxColumn colNM = new DataGridViewTextBoxColumn();

colNM.DataPropertyName = "ProductsSpec";

colNM.Name = "ProductsSpec";

colNM.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter;

colNM.HeaderText = "产品规格名称";

colNM.Width = 160;

this.dgselect.Columns.Insert(2, colNM);

DataGridViewTextBoxColumn colUnit = new DataGridViewTextBoxColumn();

colUnit.DataPropertyName = "ProductsSpecUnit";

colUnit.Name = "ProductsSpecUnit";

colUnit.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter;

colUnit.HeaderText = "产品规格单位";

colUnit.Width = 180;

this.dgselect.Columns.Insert(3, colUnit);

DataGridViewTextBoxColumn colPID = new DataGridViewTextBoxColumn();

colPID.DataPropertyName = "ProductsID";

colPID.Name = "ProductsID";

colPID.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter;

colPID.HeaderText = "产品ID";

colPID.Width = 140;

this.dgselect.Columns.Insert(4, colPID);

DataGridViewButtonColumn colButton = new DataGridViewButtonColumn();

colButton.DataPropertyName = "colSearch";

colButton.Name = "colSearch";

colButton.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter;

colButton.HeaderText = "Button";

colButton.Width = 80;

this.dgselect.Columns.Insert(5, colButton);

this.dgselect.RowHeadersWidth = 15;

this.dgselect.ColumnHeadersDefaultCellStyle.Font=new System.Drawing.Font("宋体",14);

}

3. //修改数据,并将数据提交到数据库

private Boolean dbUpdate()

{

string strSql = "select ProductsSpecID,ProductsSpec,ProductsSpecUnit,ProductsID from tbl_product_detail_master";

System.Data.DataTable dtUpdate = new System.Data.DataTable();

dtUpdate = this.dbconn(strSql);

dtUpdate.Rows.Clear();

System.Data.DataTable dtShow = new System.Data.DataTable();

//dtShow = (DataTable)this.bindSource.DataSource;

dtShow = (System.Data.DataTable)this.dgselect.DataSource;

int p1 = dtShow.Rows.Count;

// try

// {

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

{

DataRowState rowState=new DataRowState();

rowState=dtShow.Rows[i].RowState;

if (rowState==DataRowState.Added || rowState==DataRowState.Detached || rowState==DataRowState.Modified)

{

if (this.dgselect["Del", i].Value.ToString() == "1")

{

dtShow.Rows[i].Delete();

}

}

}

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

{

dtUpdate.ImportRow(dtShow.Rows[i]);

}

int num = dtUpdate.Rows.Count;

try

{

this.conn.Open();

trans = this.conn.BeginTransaction();

MySqlCommandBuilder CommandBuiler;

CommandBuiler = new MySqlCommandBuilder(this.adapter);

this.adapter.Update(dtUpdate);

trans.Commit();

this.conn.Close();

}

catch ( Exception ex)

{

MessageBox.Show(ex.Message.ToString());

trans.Rollback();

return false;

}

dtUpdate.AcceptChanges();

return true;

}