c# combobox数据绑定
表名:temp
这段: id name
记录 88 admin
06 mod
已绑定在dataset41中.
this.comboBox1.DataSource = this.dataSet41;
this.comboBox1.DisplayMember = "temp.name";
this.comboBox1.ValueMember = "temp.id";
this.comboBox1.Location = new System.Drawing.Point(0, 24);
this.comboBox1.Name = "comboBox1";
this.comboBox1.Size = new System.Drawing.Size(121, 20);
this.comboBox1.TabIndex = 4;
private void dept_SelectedValueChanged(object sender, System.EventArgs e)
{
MessageBox.Show(comboBox1.SelectedValue.ToString());//这里可以得到值id的值,但是如果为MessageBox.Show(comboBox1.SelectedItem.ToString());怎么不可以得到name的值呢?
}
通过selcetedValue.ToString()得到ValueMember的值,但如何得到DisplayMember的值啊?(如果不用数据绑定而用Item[]的话就可以用selectedItem.ToString得到name的值)谢谢。
--------------------------------------------------------------- 感谢您使用微软产品。
事实上,您可以通过comboBox1.SelectedItem.ToString()返回System.Data.DataRowView字符串,可知comboBox1.SelectedItem的返回值为System.Data.DataRowView对象。此时,需要进一步获取相应的列(Column),如CompanyName列。下面提供一段示例代码,供您参考:
private void Form1_Load(object sender, System.EventArgs e)
{
string conn = "Server=SHA-RICKIE-01;Database=northwind;uid=user;pwd=user";
SqlConnection mySqlConnection = new SqlConnection(conn);
string mySql="Select * from Customers";
SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(mySql,mySqlConnection);
DataSet myDataSet;
myDataSet = new DataSet();
mySqlDataAdapter.Fill(myDataSet,"Customers");
comboBox1.DataSource= myDataSet.Tables["Customers"];
comboBox1.DisplayMember = "CompanyName";
comboBox1.ValueMember = "CustomerID";
}
private void button1_Click(object sender, System.EventArgs e)
{
DataRowView selectedItem = (DataRowView)comboBox1.SelectedItem;
MessageBox.Show(comboBox1.SelectedValue.ToString() + "===" + selectedItem.Row["CompanyName"].ToString() );
}
Hope this is helpful!
这段: id name
记录 88 admin
06 mod
已绑定在dataset41中.
this.comboBox1.DataSource = this.dataSet41;
this.comboBox1.DisplayMember = "temp.name";
this.comboBox1.ValueMember = "temp.id";
this.comboBox1.Location = new System.Drawing.Point(0, 24);
this.comboBox1.Name = "comboBox1";
this.comboBox1.Size = new System.Drawing.Size(121, 20);
this.comboBox1.TabIndex = 4;
private void dept_SelectedValueChanged(object sender, System.EventArgs e)
{
MessageBox.Show(comboBox1.SelectedValue.ToString());//这里可以得到值id的值,但是如果为MessageBox.Show(comboBox1.SelectedItem.ToString());怎么不可以得到name的值呢?
}
通过selcetedValue.ToString()得到ValueMember的值,但如何得到DisplayMember的值啊?(如果不用数据绑定而用Item[]的话就可以用selectedItem.ToString得到name的值)谢谢。
--------------------------------------------------------------- 感谢您使用微软产品。
事实上,您可以通过comboBox1.SelectedItem.ToString()返回System.Data.DataRowView字符串,可知comboBox1.SelectedItem的返回值为System.Data.DataRowView对象。此时,需要进一步获取相应的列(Column),如CompanyName列。下面提供一段示例代码,供您参考:
private void Form1_Load(object sender, System.EventArgs e)
{
string conn = "Server=SHA-RICKIE-01;Database=northwind;uid=user;pwd=user";
SqlConnection mySqlConnection = new SqlConnection(conn);
string mySql="Select * from Customers";
SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(mySql,mySqlConnection);
DataSet myDataSet;
myDataSet = new DataSet();
mySqlDataAdapter.Fill(myDataSet,"Customers");
comboBox1.DataSource= myDataSet.Tables["Customers"];
comboBox1.DisplayMember = "CompanyName";
comboBox1.ValueMember = "CustomerID";
}
private void button1_Click(object sender, System.EventArgs e)
{
DataRowView selectedItem = (DataRowView)comboBox1.SelectedItem;
MessageBox.Show(comboBox1.SelectedValue.ToString() + "===" + selectedItem.Row["CompanyName"].ToString() );
}
Hope this is helpful!